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Artículos de revistas sobre el tema "Phosphite"

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Publicado: 4 de junio de 2021
Última modificación: 25 de julio de 2025

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1

Inoue, Hidenari, Hiromi Akahori, Yuri Ohno, et al. "Axial Coordination of Phosphine or Phosphite to Iron(III) Chlorophyll a." Zeitschrift für Naturforschung B 50, no. 8 (1995): 1222–28. http://dx.doi.org/10.1515/znb-1995-0817.

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The adduct formation of iron(III) chlorophyll a with phosphines or phosphites has been studied by spectroscopic methods. The red-shift in the Soret and Q bands caused by the axial coordination of phosphine or phosphite to iron(III) chlorophyll a is an evidence for the autoreduction of the central iron(III) ion. The 31P{1H} NMR spectrum of bis-adducts measured in the presence of excess phosphine or phosphite ligands gave a single peak in the down field range compared to that of the corresponding free ligand. The ESR and X-ray photoelectron spectra have revealed that the central iron atom of the
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2

Villa, Eric, Justin Cross, and Thomas Albrecht-Schmitt. "New Uranyl Open Framework and Sheet Compounds Formed via In-Situ Protonation of Piperazine by Phosphorous Acid." Minerals 8, no. 11 (2018): 497. http://dx.doi.org/10.3390/min8110497.

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Two new uranyl compounds were hydrothermally synthesized employing piperazine as an organic templating agent. The piperazine was protonated in-situ by phosphorous acid, forming the piperazinium dication featured in these compounds. The two new structures presented here are a uranyl phosphite 2D sheet and a 3D uranyl mixed phosphite–phosphate network with cation occupied channels. Both included strong hydrogen bonding from the piperazinium cation to the uranyl phosphite or mixed phosphite–phosphate network. These two structures can be reliably formed through careful control of pH of the startin
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3

McDonald, Allison E., Julie O. Niere, and William C. Plaxton. "Phosphite disrupts the acclimation of Saccharomyces cerevisiae to phosphate starvation." Canadian Journal of Microbiology 47, no. 11 (2001): 969–78. http://dx.doi.org/10.1139/w01-099.

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The influence of phosphite (H2PO3–) on the response of Saccharomyces cerevisiae to orthophosphate (HPO42–; Pi) starvation was assessed. Phosphate-repressible acid phosphatase (rAPase) derepression and cell development were abolished when phosphate-sufficient (+Pi) yeast were subcultured into phosphate-deficient (–Pi) media containing 0.1 mM phosphite. By contrast, treatment with 0.1 mM phosphite exerted no influence on rAPase activity or growth of +Pi cells. 31P NMR spectroscopy revealed that phosphite is assimilated and concentrated by yeast cultured with 0.1 mM phosphite, and that the levels
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4

Förster, H., J. E. Adaskaveg, D. H. Kim, and M. E. Stanghellini. "Effect of Phosphite on Tomato and Pepper Plants and on Susceptibility of Pepper to Phytophthora Root and Crown Rot in Hydroponic Culture." Plant Disease 82, no. 10 (1998): 1165–70. http://dx.doi.org/10.1094/pdis.1998.82.10.1165.

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Tomato and pepper plants were grown hydroponically in a greenhouse using phosphate or technical and commercial formulations of phosphite as sources of phosphorus nutrition to determine the effects on plant development and susceptibility to Phytophthora root and crown rot. Phosphite-treated tomato and pepper plants were deficient of phosphate and developed phosphorus-deficiency symptoms. Growth of plants (leaf area and leaf, stem, and root dry weights) that were fertilized with phosphite was significantly (P < 0.05) reduced compared with phosphate-fertilized plants. In Phytophthora capsici–i
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5

Ávila, Fabricio William, Valdemar Faquin, Douglas Ramos Guelfi Silva, Carla Elisa Alves Bastos, Nilma Portela Oliveira, and Danilo Araújo Soares. "Phosphite as phosphorus source to grain yield of common bean plants grown in soils under low or adequate phosphate availability." Ciência e Agrotecnologia 36, no. 6 (2012): 639–48. http://dx.doi.org/10.1590/s1413-70542012000600006.

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The effects of foliar and soil applied phosphite on grain yield in common bean (Phaseolus vulgaris L.) grown in a weathered soil under low and adequate phosphate availability were evaluated. In the first experiment, treatments were composed of a 2 x 7 + 2 factorial scheme, with 2 soil P levels supplied as phosphate (40 e 200 mg P dm-3 soil), 7 soil P levels supplied as phosphite (0-100 mg P dm-3 soil), and 2 additional treatments (without P supply in soil, and all P supplied as phosphite). In the second experiment, treatments were composed of a 2 x 3 x 2 factorial scheme, with 2 soil phosphate
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6

Deliy, Irina, Ivan Shamanaev, Pavel Aleksandrov, et al. "Support Effect on the Performance of Ni2P Catalysts in the Hydrodeoxygenation of Methyl Palmitate." Catalysts 8, no. 11 (2018): 515. http://dx.doi.org/10.3390/catal8110515.

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The effect of support nature, SiO2 and γ-Al2O3, on physicochemical and catalytic properties of nickel phosphide catalysts in methyl palmitate hydrodeoxygenation (HDO) has been considered. Firstly, alumina-supported nickel phosphide catalysts prepared by temperature-programmed reduction method starting from different precursors (phosphate–Ni(NO3)2 and (NH4)2HPO4 or phosphite–Ni(OH)2 and H3PO3) were compared using elemental analysis, N2 physisorption, H2-TPR, XRD, TEM, NH3-TPD, 27Al and 31P MAS NMR techniques and catalytic experiments. The mixture of nickel phosphide phases was produced from pho
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7

Oka, Yuji, Nadia Tkachi, and Mishael Mor. "Phosphite Inhibits Development of the Nematodes Heterodera avenae and Meloidogyne marylandi in Cereals." Phytopathology® 97, no. 4 (2007): 396–404. http://dx.doi.org/10.1094/phyto-97-4-0396.

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Phosphonic acid (H3PO3) solutions were applied to wheat or to bristle oat as soil drenches before inoculation with juveniles of the sedentary, endoparasitic nematodes Heterodera avenae or Meloidogyne marylandi. All the solutions, which were pH adjusted and added at levels as low as 0.63 mg of phosphite (HPO32-) per plant, reduced the numbers of H. avenae females and M. marylandi egg masses. Phosphate (PO43-), applied as potassium phosphate at the same concentrations, did not reduce the number of female nematodes on the wheat. Addition of phosphate to the phosphite solutions did not change the
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8

Liu, Kunlu, Min Wang, Yubo Zhou, et al. "Exploration of the cofactor specificity of wild-type phosphite dehydrogenase and its mutant using molecular dynamics simulations." RSC Advances 11, no. 24 (2021): 14527–33. http://dx.doi.org/10.1039/d1ra00221j.

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9

Guidone, Stefano, Fady Nahra, Alexandra M. Z. Slawin, and Catherine S. J. Cazin. "Ruthenium indenylidene “1st generation” olefin metathesis catalysts containing triisopropyl phosphite." Beilstein Journal of Organic Chemistry 11 (September 1, 2015): 1520–27. http://dx.doi.org/10.3762/bjoc.11.166.

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The reaction of triisopropyl phosphite with phosphine-based indenylidene pre-catalysts affords “1st generation” cis-complexes. These have been used in olefin metathesis reactions. The cis-Ru species exhibit noticeable differences with the trans-Ru parent complexes in terms of structure, thermal stability and reactivity. Experimental data underline the importance of synergistic effects between phosphites and L-type ligands.
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10

Araujo, Josinaldo Lopes, Fabrício William de Ávila, and Valdemar Faquin. "Phosphite and phosphate in the accumulation and translocation of nutrients in common bean1." Pesquisa Agropecuária Tropical 46, no. 4 (2016): 357–66. http://dx.doi.org/10.1590/1983-40632016v4640810.

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ABSTRACT Although used as an additional nutritional source of phosphorus in agriculture, little is known about the effects of phosphites on plants. In order to evaluate the influence of phosphite and phosphate on the accumulation and translocation of phosphorus and cationic nutrients, in common bean, three experiments were conducted. In the first experiment, five concentrations (0.5 mg L-1, 10 mg L-1, 20 mg L-1, 30 mg L-1 and 60 mg L-1) were studied in a nutrient solution combined with two forms of phosphorus [phosphate (Pi) and phosphite (Phi)]. In the second one, five Phi/Pi ratios were test
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11

Metcalf, William W., and Ralph S. Wolfe. "Molecular Genetic Analysis of Phosphite and Hypophosphite Oxidation by Pseudomonas stutzeriWM88." Journal of Bacteriology 180, no. 21 (1998): 5547–58. http://dx.doi.org/10.1128/jb.180.21.5547-5558.1998.

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ABSTRACT The first molecular and genetic characterization of a biochemical pathway for oxidation of the reduced phosphorus (P) compounds phosphite and hypophosphite is reported. The pathway was identified inPseudomonas stutzeri WM88, which was chosen for detailed studies from a group of organisms isolated based on their ability to oxidize hypophosphite (+1 valence) and phosphite (+3 valence) to phosphate (+5 valence). The genes required for oxidation of both compounds by P. stutzeri WM88 were cloned on a single ca. 30-kbp DNA fragment by screening for expression in Escherichia coli and Pseudom
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12

Szirtes, L., A. M. Szeleczky, and E. Kuzmann. "Zirconium phosphate–phosphite containing silica." Solid State Ionics 97, no. 1-4 (1997): 223–26. http://dx.doi.org/10.1016/s0167-2738(97)00045-3.

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13

Kasuga, Takao, Katherine J. Hayden, Catherine A. Eyre, et al. "Innate Resistance and Phosphite Treatment Affect Both the Pathogen’s and Host’s Transcriptomes in the Tanoak-Phytophthora ramorum Pathosystem." Journal of Fungi 7, no. 3 (2021): 198. http://dx.doi.org/10.3390/jof7030198.

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Phosphites have been used to control Sudden Oak Death; however, their precise mode of action is not fully understood. To study the mechanism of action of phosphites, we conducted an inoculation experiment on two open-pollinated tanoak families, previously found to be partially resistant. Stems of treatment group individuals were sprayed with phosphite, and seven days later, distal leaves were inoculated with the Sudden Oak Death pathogen Phytophthora ramorum. Leaves from treated and untreated control plants were harvested before and seven days after inoculation, and transcriptomes of both host
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14

Formisano, Luigi, Begoña Miras-Moreno, Michele Ciriello, et al. "Trichoderma and Phosphite Elicited Distinctive Secondary Metabolite Signatures in Zucchini Squash Plants." Agronomy 11, no. 6 (2021): 1205. http://dx.doi.org/10.3390/agronomy11061205.

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Plant biostimulants are “green” solutions to improve crop production. Trichoderma spp. and phosphites, ordinarily used as biocontrol agents, can trigger phytostimulation, also promoting endogenous mechanisms involved in plant growth and development. The present study aimed at assessing the efficacy of a phosphite-based formulation (Phosphit-One) and Trichoderma harzianum-T22 on the morpho-physiological response and modulation of the metabolomics profile in zucchini squash plants (Cucurbita pepo L.) cultivated in controlled growth conditions (Fitotron®). The highest values of fresh biomass prod
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15

Jackson, WR, CG Lovel, P. Perlmutter, and AJ Smallridge. "The Stereochemistry of Organometallic Compounds. XXXI. Hydrocyanation of Alkynols." Australian Journal of Chemistry 41, no. 7 (1988): 1099. http://dx.doi.org/10.1071/ch9881099.

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The regioselectivity of hydrocyanation of a range of alkynols using nickel-based catalyst systems involving either triphenyl phosphite or α,α′-bis(diphenylphosphino)-o-xylene (phmep) has been investigated. The regioselectivity of the hydrocyanations involving the phosphine catalyst reflected dominant steric effects whereas results from the phosphite catalyst system showed some evidence for chelation control. Yields of nitriles from reactions based on the phosphite system were variable, whereas moderate to good yields of distilled products could be obtained consistently by using the phosphine -
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16

Motevalli, Somayeh, and Jeffrey Johnson. "Phosphite-Mediated Reductive Cross-Coupling of Isatins and Nitro­styrenes." Synthesis 49, no. 12 (2017): 2663–76. http://dx.doi.org/10.1055/s-0036-1588170.

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A new reductive coupling reaction between N-alkylisatins, dimethyl phosphite, and nitrostyrenes has been developed. The reaction relies on Pudovik addition, subsequent phosphonate–phosphate rearrangement, and Michael-type addition of a transient carbanion on the indolinone with β-nitrostyrenes. This protocol introduces a convenient and versatile method for the construction of polyfunctionalized tertiary phosphates under mild conditions. Chiral general bases catalyze the title reaction with promising levels of enantioselectivity.
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17

Tkaczyk, Miłosz, Katarzyna A. Kubiak, Jacek Sawicki, Justyna A. Nowakowska, and Tomasz Oszako. "The use of phosphates in forestry." Forest Research Papers 77, no. 1 (2016): 76–81. http://dx.doi.org/10.1515/frp-2016-0009.

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Abstract Phosphite preparations are now an important alternative in plant protection against new, invasive pathogens of the genus Phytophthora and/or Pythium. It is crucial to intervene when alien, invasive oomycetes are carried to plantations or forest stands and attack fine roots via zoospores. The aim of this paper was to demonstrate the possibility of phosphite application to induce resistance to tree pathogens. Phosphate-based fertilizers have been used successfully in nurseries, where application is relatively easy by means of foliar sprays. the traditional fungicides, which are effectiv
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18

Jiao, Yunzhe, William W. Brennessel, and William D. Jones. "A tris(pyrazolyl)borate rhodium phosphite complex that undergoes an Arbusov-like rearrangement." Acta Crystallographica Section C Crystal Structure Communications 69, no. 9 (2013): 939–42. http://dx.doi.org/10.1107/s0108270113015953.

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Tp′Rh[P(OMe)3](Me)H, loses methane in pentane solution containing CH2F2to give the scorpionate complex bis(μ-dimethyl phosphito)-κ2P:O;κ2O:P-bis{methyl[tris(3,5-dimethyl-1H-pyrazol-1-yl-κN2)borato]rhodium(III)}, [Rh2(CH3)2(C2H6O3P)2(C15H22BN6)2], in which the phosphine O—Me bond is cleaved. The product is dimeric and resembles the Arbusov-type rearrangement product known to form from trimethyl phosphite.
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19

Isama, K., T. Kawakami, and Y. Ikarashi. "Cytotoxicity of phosphite and phosphate triesters." Toxicology Letters 238, no. 2 (2015): S365. http://dx.doi.org/10.1016/j.toxlet.2015.08.1044.

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20

Banko, T. J., and C. X. Hong. "Evaluation of Nutrient Phosphite for the Control of Phytophthora Shoot Blight on Annual Vinca." Journal of Environmental Horticulture 22, no. 1 (2004): 41–44. http://dx.doi.org/10.24266/0738-2898-22.1.41.

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Abstract Annual vinca (Catharanthus roseus) were grown in containers in a greenhouse and irrigated with a complete nutrient solution containing phosphite (0, 0.1, 0.3 mM), phosphate (0, 0.3, 0.5 mM), or combinations of these two compounds as a source of phosphorus. After 2 weeks, the plants were sprayed with a Phytophthora nicotianae zoospore inoculum to evaluate the potential for phosphite to protect annual vinca from Phytophthora shoot blight. To determine the extent and duration of protection from shoot blight provided by phosphite foliar applications, the plants were treated with phosphite
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21

Tarasenko, Karen V., Igor I. Gerus, Valery P. Kukhar та Vitaly V. Polovinko. "Reactions of β-aminovinyl bromodifluoromethyl ketones with alkyl phosphites: Perkow versus Arbuzov". Collection of Czechoslovak Chemical Communications 74, № 2 (2009): 335–46. http://dx.doi.org/10.1135/cccc2008095.

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New bromodifluoromethyl enaminones 1a–1f and γ-bromo-β-morpholinopropenyl fluoromethyl ketones 2a, 2b were synthesized. N-Substituted bromodifluoromethyl enaminones 1a–1d do not react with triethyl or diethyl phosphites, whereas N-acylated enaminones 1e, 1f gave difluorodienyl phosphates 4a, 4b as Perkow rearrangement products. Fluoroketone 2a reacts easily with triethyl phosphite according to the Arbuzov protocol and a perspective building block – trifluoromethyl-containing phosphonate 7a is formed.
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22

Abdreimova, R. R., F. Kh Faizova, and A. A. Karimova. "Copper (II) Catalyzed Oxidative Alkoxylation of White Phosphorus. Communication 2." Eurasian Chemico-Technological Journal 12, no. 3,4 (2010): 267. http://dx.doi.org/10.18321/ectj54.

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White phosphorus has been catalytically oxidized by oxygen in alcoholic solutions of copper (II) acetylacetonate, halides or carboxylates to yield dialkyl phosphites and trialkyl phosphates under mild reaction conditions. Trialkyl phosphite has been observed as unstable organophosphorus intermediate, which is being converted into the main reaction products. In the case of methanolic solutions, the derivatives of two step acidolysis of dimethyl phosphite, monomethyl phosphite and phosphorous acid, have been additionally detected among the reaction products. The influence of the copper (II) cata
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23

Inoue, Hidenari, Masahiro Sasagawa, and Ekkehard Fluck. "31P-NMR-und 57Fe-Mößbauer-spektroskopische Untersuchungen an Pentacyano(phosphan oder phosphit)ferraten(II) / 31P NMR and 57Fe Mössbauer Spectroscopic Studies on Pentacyano(phosphane or phosphite)ferrates(II)." Zeitschrift für Naturforschung B 40, no. 1 (1985): 22–25. http://dx.doi.org/10.1515/znb-1985-0107.

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The 31P{1H}NMR spectra for a series of pentacyanoferrates(II) of the type Na3[Fe(CN)5L] (L = phosphine or phosphite) have been measured. A low field chemical shift range of 48.1-88.7 ppm for phosphine complexes and of 32.5-48.4 ppm for phosphite complexes is observed when one compares free vs. coordinated ligands. The correlation between chemical shifts in the 31P NMR spectra and isomeric shifts in the Mössbauer spectra is investigated and discussed
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24

Lemmen, Peter, Rosmarie Karl, Ivar Ugi, Neil Balgobin та Jyoti Chattopadhyaya. "Bausteine für Oligonucleotid-Synthesen mit einheitlich fragmentierbaren β-halogenierten Schutzgruppen /Building Blocks for Oligonucleotide Syntheses with Uniformly Fragmentable β-Halogenated Protecting Groups". Zeitschrift für Naturforschung C 42, № 4 (1987): 442–45. http://dx.doi.org/10.1515/znc-1987-0419.

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Abstract 5′-Dimethoxytrityl-3′-phosphite amides of deoxynucleosides are synthesized. Phosphite/phosphate is protected by the 2,2,2-trichloro-1,1-dimethyl-ethyl (TCB) group, heterocyclic bases by the 2,2,2-trichloro-2,2-dimethyl-ethoxycarbonyl (TCBOC) group. Deoxyguanosine is also block­ ed by 6-O-trichloroethyl thus avoiding the difficulties observed with monoprotected guanine residues.
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25

Gull, Maheen, Tian Feng, and Matthew A. Pasek. "Results of an Eight-Year Extraction of Phosphorus Minerals within the Seymchan Meteorite." Life 12, no. 10 (2022): 1591. http://dx.doi.org/10.3390/life12101591.

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In-fall of extraterrestrial material including meteorites and interstellar dust particles during the late heavy bombardment are known to have brought substantial amounts of reduced oxidation-state phosphorus to the early Earth in the form of siderophilic minerals, e.g., schreibersite ((FeNi)3P). In this report, we present results on the reaction of meteoritic phosphide minerals in the Seymchan meteorite in ultrapure water for 8 years. The ions produced during schreibersite corrosion (phosphite, hypophosphate, pyrophosphate, and phosphate) are stable and persistent in aqueous solution over this
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26

Cutolo, Edoardo, Matteo Tosoni, Simone Barera, Luis Herrera-Estrella, Luca Dall’Osto, and Roberto Bassi. "A Phosphite Dehydrogenase Variant with Promiscuous Access to Nicotinamide Cofactor Pools Sustains Fast Phosphite-Dependent Growth of Transplastomic Chlamydomonas reinhardtii." Plants 9, no. 4 (2020): 473. http://dx.doi.org/10.3390/plants9040473.

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Heterologous expression of the NAD+-dependent phosphite dehydrogenase (PTXD) bacterial enzyme from Pseudomonas stutzerii enables selective growth of transgenic organisms by using phosphite as sole phosphorous source. Combining phosphite fertilization with nuclear expression of the ptxD transgene was shown to be an alternative to herbicides in controlling weeds and contamination of algal cultures. Chloroplast expression of ptxD in Chlamydomonas reinhardtii was proposed as an environmentally friendly alternative to antibiotic resistance genes for plastid transformation. However, PTXD activity in
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27

Mihichuk, Lynn, Monica Pizzey, Beverly Robertson, and Richard Barton. "The synthesis and seven-coordinate structure of (CH3)2AsC(CF3=C(CF3)As(CH3)2W(CO)Br2[P(OCH3)3]2." Canadian Journal of Chemistry 64, no. 5 (1986): 991–95. http://dx.doi.org/10.1139/v86-166.

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(L–L)W(CO)4 (L–L = (CH3AsC(CF3)=C(CF3)As(CH3)2) is oxidized by Br2 to yield the seven-coordinate complex (L–L)W(CO)3Br2, which reacts with monodentate phosphines or phosphites to form (L–L)W(CO)Br2P2 (P = phosphine or phosphite). Crystals of (L–L)W(CO)Br2[P(OCH3)3]2 are monoclinic, space group P21/c, a = 19.110(5), b = 9.208(3), c = 17.845(6) Å, β = 108.93(2)° at 21 °C with Z = 4. The structure was solved from a Patterson map and refined by least squares to a conventional R value of 0.092 using 2330 independent reflections. The crystal structure indicated the tungsten atom to be seven-coordina
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28

Zhuang, Quan, and Jack M. Miller. "Sol-gel synthesis of ternary phosphate-ZrO2-SiO2 catalysts for alcohol dehydration." Canadian Journal of Chemistry 79, no. 8 (2001): 1224–28. http://dx.doi.org/10.1139/v01-108.

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Phosphate–ZrO2–Si2O catalysts were synthesized by sol-gel method using tributyl phosphite, zirconium propoxide, and tetraethyl orthosilicate as precursors. They were characterized by N2 adsorption, 31P CP MAS NMR, and DRIFTS. At lower P content, monomeric phosphates were formed on the surface of the catalysts, which were mainly responsible for the isopropanol dehydration activity. At higher P content, polyphosphates were formed, and thus, the dehydration activity decreased. An optimum P content for dehydration activity was found to be at 10 mol%.Key words: sol-gel synthesis, ternary oxides, ph
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29

Prévôté, Delphine, Anne-Marie Caminade, and Jean Pierre Majoral. "Phosphate-, Phosphite-, Ylide-, and Phosphonate-Terminated Dendrimers." Journal of Organic Chemistry 62, no. 14 (1997): 4834–41. http://dx.doi.org/10.1021/jo9701750.

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30

Lee, Jin-Kyun, Rachel M. Williamson, Andrew B. Holmes, Edward J. Bush, and Ian F. McConvey. "A Study of the Heck Reaction in Non-Polar Hydrocarbon Solvents and in Supercritical Carbon Dioxide." Australian Journal of Chemistry 60, no. 8 (2007): 566. http://dx.doi.org/10.1071/ch07160.

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The effects of electronic and steric properties of phosphorus ligands on Heck reactions in supercritical CO2 and non-polar hydrocarbon solvents were studied. In Heck reactions between iodobenzene and butyl acrylate, higher yields were obtained with less electron-rich phosphine ligands. This trend was also observed with the electron-poor triphenyl phosphite. A range of sterically demanding phosphites were then investigated. Biphenyl-containing phosphites 8 and 13 were found to be highly effective. In the Heck reaction between the less-reactive bromobenzene and butyl acrylate, the bulky, electro
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31

Mihichuk, Lynn M., Carolyn L. Giesinger, Beverly E. Robertson, and Richard J. Barton. "Seven coordination. 1. Synthesis, structure, and fluxionality of(CH3)2AsC(CF3)=C(CF3)As(CH3)2W(CO)2I2P(OCH3)3." Canadian Journal of Chemistry 65, no. 11 (1987): 2634–38. http://dx.doi.org/10.1139/v87-435.

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(L—L)W(CO)4 (L—L = (CH3)2AsC(CF3)=C(CF3)As(CH3)2) is oxidized by I2 to yield the seven-coordinate complex (L—L)W(CO)3I2 which reacts with monodentate phosphines or phosphites to form (L—L)W(CO)2I2P (P = phosphine or phosphite). Crystals of (L—L)W(CO)2I2P(OCH3)3 are monoclinic, space group P21/c, a = 15.711(3), b = 13.134(2), c = 13.800(3) Å, β = 111.81(2)° with Z = 4. The structure was solved from a Patterson map and anisotropically refined by least squares to a conventional R value of 0.039 using 3737 independent reflections. The crystal structure showed the tungsten atom to be seven-coordina
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32

Kleman, P., P. Barbaro, and A. Pizzano. "Chiral Rh phosphine–phosphite catalysts immobilized on ionic resins for the enantioselective hydrogenation of olefins in water." Green Chemistry 17, no. 7 (2015): 3826–36. http://dx.doi.org/10.1039/c5gc00485c.

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33

Navarro Cerrillo, R. Mª, L. Gallo Ibáñez, Mª E. Sánchez Hernández, P. Fernández Rebollo, and A. Trapero Casas. "Effect of phosphoric fertilization on the resistance of holm oak and cork oak to Phytophthora cinnamomi Rands." Forest Systems 13, no. 3 (2004): 550–58. http://dx.doi.org/10.5424/srf/2004133-00853.

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The oomycete Phytophthora cinnamomi Rands is the mean responsible for oak decline in southern Spain. This paper investigates the relationship between phosphoric fertilization of Quercus ilex and Q. suber seedlings and resistance to the disease caused by Phytophthora cinnamomi. The study was conducted on holm oak and cork oak seedlings previously submitted to a phosphoric fertilization programme involving four different treatments, namely: Phosphate-A (3 mg P2O5 seedling), Phosphate-B (6 mg P2O5 seedling), Phosphite (0.15 mg de P2O5 seedling) and No Fertilization. Tests were conducted in greenh
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34

Kampmann, Sven S., Nikki Y. T. Man, Allan J. McKinley, George A. Koutsantonis, and Scott G. Stewart. "Exploring the Catalytic Reactivity of Nickel Phosphine–Phosphite Complexes." Australian Journal of Chemistry 68, no. 12 (2015): 1842. http://dx.doi.org/10.1071/ch15459.

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In this study, we present an investigation into various nickel phosphite and phosphite–phosphine complexes for use in the Mizoroki–Heck and Suzuki–Miyaura cross-coupling reactions and the ammonia arylation reaction. In these coupling reactions, it was discovered that the Ni[P(OEt)3]4, (dppf)Ni[P(OPh)3]2, and (binap)Ni[P(OPh)3]2 catalysts were the most effective. In addition, an optimisation process for these catalytic systems as well as functional group compatibility are discussed.
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35

Bishimbayeva, G. K., A. M. Nalibayeva, S. A. Saidullayeva, et al. "EXTRACTION PROPERTIES OF SYNTHESIZED FLUORINATED ORGANOPHOSPHORUS COMPOUNDS." RASAYAN Journal of Chemistry 16, no. 01 (2023): 440–46. http://dx.doi.org/10.31788/rjc.2023.1618246.

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This work presents the results of studies of extraction properties in relation to the uranium of bis(2,2,2- trifluoroethyl)diallylamido phosphite, bis(2,2,2-trifluoroethyl)dimethylamido phosphite, and bis(N,Ndialamido)isopropyl phosphite synthesized by us earlier. Tests were carried out in a factory laboratory, as the initial solutions used nitrate solution prepared from uranium oxide (CU = 10.30 g/dm3 , CHNO3 = 56.40 g/dm3 ) and uranium sulfate solution prepared from the chemical concentrate of natural uranium and deoxidized with sulfuric acid (CU = 10.60 g/dm3 , CH2SO4 = 25.10 g/dm3 ). It wa
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36

Schreiner, R. Paul. "Foliar Sprays Containing Phosphorus (P) Have Minimal Impact on ‘Pinot noir’ Growth and P Status, Mycorrhizal Colonization, and Fruit Quality." HortScience 45, no. 5 (2010): 815–21. http://dx.doi.org/10.21273/hortsci.45.5.815.

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Grapevines grown in low-phosphorus (P) soils typical of western Oregon vineyards may benefit from additional P applied to the canopy using foliar sprays. Alternatively, vines may be negatively affected by foliar P sprays because lower root colonization by arbuscular mycorrhizal fungi (AMF) could reduce uptake of other nutrients or increase vine water stress. The impact of foliar P sprays on vine growth, vine nutrient and water status, AMF colonization, and fruit yield and quality was studied in two ‘Pinot noir’ vineyards with a history of low vine P status over 3 years. Three foliar spray trea
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37

Abdreimova, R. R., F. Kh Faizova, and A. A. Karimova. "Copper (II) Mediated Oxidative Alkoxylation of White Phosphorus. Communication 1." Eurasian Chemico-Technological Journal 12, no. 3,4 (2010): 259. http://dx.doi.org/10.18321/ectj53.

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White phosphorus has been oxidized by copper (II) acetylacetonate, halides or carboxylates in aliphatic alcohols to yield dialkyl phosphates and trialkyl phosphates under inert atmosphere and mild reaction conditions. Trialkyl phosphite has been observed as unstable organophosphorus intermediate, which is being converted into the main reaction products. In the case of methanolic solutions, the derivatives of two step acidolysis of dimethyl phosphite, monomethyl phosphite and phosphorous acid, have been additionally detected among the reaction products. The influence of the copper (II) oxidants
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38

Guo, Shengmei, Hu Cai, Wenjie Yan, et al. "NiCl2 as a Cheap and Efficient Precatalyst for the Coupling of Aryl Fluorosulfonate and Phosphite/Phosphine Oxide." Synlett 32, no. 14 (2021): 1453–56. http://dx.doi.org/10.1055/a-1524-4912.

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AbstractHerein, NiCl2 is employed as a cheap precatalyst in the formation of C(sp2)–P bond via cross-coupling reaction of phenol derivatives and phosphine oxides/phosphites. This catalytic system allows a variety of phenols with diverse functional groups to transform into phosphates with good yields. No additional additive is used in this reaction.
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39

Grzebisz, Witold, Szymon Łączny, Witold Szczepaniak, and Jarosław Potarzycki. "Inorganic Fungicides (Phosphites) Instead of Organic Fungicides in Winter Wheat—Consequences for Nitrogen Fertilizer Productivity." Agronomy 13, no. 3 (2023): 627. http://dx.doi.org/10.3390/agronomy13030627.

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Substitution of organic with inorganic fungicides (phosphites, Phi) does not change the efficiency of fertilizer nitrogen (Nf) in winter wheat. This hypothesis was tested in the 2016/2017 and 2017/2018 growing seasons. A two-factorial experiment with three phosphite variants (Cu–Phi, Mg–Phi, and Cu/Mg) and six plant protection methods (fungicides + Phi ⟶ reduced fungicide frequency + phosphite ⟶ phosphite). Grain yield decreased with increasing frequency of phosphites instead of fungicides. The decrease in yields was 3.6 t ha−1 in the favorable 2016/2017 and 1.1 t ha−1 in the dry 2017/2018. Th
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40

Chen, Rui Xin, Ling Yan Xu, and Chang Feng Sun. "Three-Dimensional Open-Framework Zinc Phosphite: Synthesis and Characterization." Advanced Materials Research 455-456 (January 2012): 730–34. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.730.

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Generally, open-framework metal phosphites like phosphates, are synthesized under hydrothermal or solvothermal conditions in the presence of organic amines, which may act as structure-directing agent or template to avoid the formation of dense phase, but few of them has been successfully prepared at room temperature which seems to be difficult to synthesize these compounds. In this work, at room temperature, employing n-propylamine as a template, a three-dimensional zinc phosphite (C3H10N) 2·[Zn3(HPO3)4] has been prepared and characterized by single-crystal X-ray diffraction, FTIR, elemental a
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41

Ramazanova, Kyzgaldak, Soumyadeep Chakrabortty, Bernd H. Müller, Peter Lönnecke, Johannes G. de Vries, and Evamarie Hey-Hawkins. "Synthesis of P-stereogenic 1-phosphanorbornane-derived phosphine–phosphite ligands and application in asymmetric catalysis." RSC Advances 13, no. 49 (2023): 34439–44. http://dx.doi.org/10.1039/d3ra07630j.

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A convenient synthesis of enantiopure mixed donor phosphine–phosphite ligands has been developed incorporating P-stereogenic phosphanorbornane and axially chiral bisnaphthols into one ligand structure.
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42

Pereira, Mariette M., Mário J. F. Calvete, Rui M. B. Carrilho, and Artur R. Abreu. "Synthesis of binaphthyl based phosphine and phosphite ligands." Chemical Society Reviews 42, no. 16 (2013): 6990. http://dx.doi.org/10.1039/c3cs60116a.

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43

Averbuch-Pouchot, M. T. "Structures of glycinium phosphite and glycylglycinium phosphite." Acta Crystallographica Section C Crystal Structure Communications 49, no. 4 (1993): 815–18. http://dx.doi.org/10.1107/s0108270192010771.

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44

Heutz, Frank J. L., and Paul C. J. Kamer. "Modular solid-phase synthesis, catalytic application and efficient recycling of supported phosphine–phosphite ligand libraries." Dalton Transactions 45, no. 5 (2016): 2116–23. http://dx.doi.org/10.1039/c5dt03226a.

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45

Changko, Saowalak, Priscilla D. Rajakumar, Rosanna E. B. Young, and Saul Purton. "The phosphite oxidoreductase gene, ptxD as a bio-contained chloroplast marker and crop-protection tool for algal biotechnology using Chlamydomonas." Applied Microbiology and Biotechnology 104, no. 2 (2019): 675–86. http://dx.doi.org/10.1007/s00253-019-10258-7.

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AbstractEdible microalgae have potential as low-cost cell factories for the production and oral delivery of recombinant proteins such as vaccines, anti-bacterials and gut-active enzymes that are beneficial to farmed animals including livestock, poultry and fish. However, a major economic and technical problem associated with large-scale cultivation of microalgae, even in closed photobioreactors, is invasion by contaminating microorganisms. Avoiding this requires costly media sterilisation, aseptic techniques during set-up and implementation of ‘crop-protection’ strategies during cultivation. H
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46

Hamblin, M. R., J. S. Flora, and B. V. L. Potter. "myo-Inositol phosphorothioates, phosphatase-resistant analogues of myo-inositol phosphates. Synthesis of dl-myo-inositol 1,4-bisphosphate and dl-myo-inositol 1,4-bisphosphorothioate." Biochemical Journal 246, no. 3 (1987): 771–74. http://dx.doi.org/10.1042/bj2460771.

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Syntheses of a metabolite of the second messenger myo-inositol 1,4,5-trisphosphate, myo-inositol 1,4-bisphosphate, and an analogue, the 1,4-bisphosphorothioate, are reported, by using phosphite chemistry on (+/-)-1,2:4,5-di-isopropylidene-myo-inositol. The synthesis of (+/-)-1,2:4,5-di-isopropylidene 3,6-bis[di-(2-cyanoethyl)]phosphite provides an intermediate that can be oxidized to either the corresponding bisphosphate or bisphosphorothioate. myo-Inositol phosphorothioates are proposed as novel analogues of myo-inositol phosphates; their resistance to phosphatase-catalysed breakdown is repor
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47

Biosca, Maria, Oscar Pàmies, and Montserrat Diéguez. "Ir–Biaryl phosphite–oxazoline catalyst libraries: a breakthrough in the asymmetric hydrogenation of challenging olefins." Catalysis Science & Technology 10, no. 3 (2020): 613–24. http://dx.doi.org/10.1039/c9cy02501d.

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48

León, Félix, Aleix Comas-Vives, Eleuterio Álvarez, and Antonio Pizzano. "A combined experimental and computational study to decipher complexity in the asymmetric hydrogenation of imines with Ru catalysts bearing atropisomerizable ligands." Catalysis Science & Technology 11, no. 7 (2021): 2497–511. http://dx.doi.org/10.1039/d0cy02390f.

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RuCl<sub>2</sub>(P–OP)(N–N) complexes containing an atropisomerizable phosphine–phosphite and a chiral diamine are effective catalyst precursors for the asymmetric hydrogenation of N-aryl imines following an outer-sphere mechanism.
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49

Jakob, Alexander, Heike Schmidt, Patrice Djiele, Yingzhong Shen, and Heinrich Lang. "Phosphane/phosphite silver(I) carboxylates as CVD precursors." Microchimica Acta 156, no. 1-2 (2006): 77–81. http://dx.doi.org/10.1007/s00604-006-0592-z.

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50

Brynda, Jiří, Bohumil Kratochvíl, and Ivana Císařová. "The determination of crystal structure of chromium(II) phosphite dihydrate, CrHPO3 2 H2O." Collection of Czechoslovak Chemical Communications 52, no. 7 (1987): 1742–47. http://dx.doi.org/10.1135/cccc19871742.

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The crystal structure of CrHPO3.2 H2O has been solved by the heavy atom method. The compound crystallizes in the orthorhombic space group P212121 with the unit cell parameters a = 679·25(8), b = 915·61(8), c = 752·2(1) pm, Z = 4. The structure was refined to the final reliability factor R = 0·043 for 1 040 observed reflexions (I &gt; 1·96σ(I)). The structure consists of chains formed by CrO6 octahedra connected each other in vertices. The chains are interconnected by phosphite tetrahedra HPO3. Hydrogen bridges of water-phosphite tetrahedron and water-water types form space cross-linking of the
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