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Journal articles on the topic 'Metal-metal bond multinuclear NMR'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Tušek-Božic, Ljerka, Manda Curic, Dražen Vikic-Topic та Antonín Lyčka. "Multinuclear NMR Studies of Palladium(II) Dihalide Complexes of Dibutyl {α-[4-(Phenyldiazenyl)anilino]benzyl}phosphonate". Collection of Czechoslovak Chemical Communications 62, № 12 (1997): 1888–904. http://dx.doi.org/10.1135/cccc19971888.

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The 1H, 13C, 15N and 31P NMR studies of two types of palladium(II) dihalide complexes of dibutyl {α-[4-(phenyldiazenyl)anilino]benzyl}phosphonate (L) are reported: those with the monodentate trans-bonded ligands through the azo nitrogen, trans-Pd(L)2X2 (X = Cl, Br), and a cyclopalladated binuclear complex in which chloride ions bridge two metal centers, [Pd(L-H)(μ-Cl)]2. The 15N-enriched organophosphorus compound and its palladium(II) complexes were also prepared to enable unambiguous determination of the nitrogen ligation site by 15N NMR. The NMR analysis was accomplished by one- and two-dime

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2

Ma, Guibin, Mikhail Maliarik, Licheng Sun, and Julius Glaser. "Novel porphyrin–thallium–platinum complex with “naked” metal–metal bond: multinuclear NMR characterization of [(tpp)Tl–Pt(CN)5]2− and [(thpp)Tl–Pt(CN)5]2− in solution." Inorganica Chimica Acta 357, no. 14 (2004): 4073–77. http://dx.doi.org/10.1016/j.ica.2004.06.029.

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3

Rajalingam, Umarani, Philip AW Dean, and Hilary A. Jenkins. "Solution multinuclear (31P,111Cd,77Se) magnetic resonance studies of cadmium complexes of heterocyclic aromatic thiones and the structure of [tetrakis(2(1H)-pyridinethione)cadmium] nitrate, [Cd(C5H5NS)4](NO3)2." Canadian Journal of Chemistry 78, no. 5 (2000): 590–97. http://dx.doi.org/10.1139/v00-070.

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The complex salts CdL4(O3SCF3)2 (L = 2(1H)-pyridinethione (Py2SH), 4(1H)-pyridinethione (Py4SH), or 2(1H)-quinolinethione (Q2SH)) have been synthesized by the stoichiometric reaction of Cd(O3SCF3)2 and the appropriate thione. Both ambient-temperature 13C and reduced-temperature 111Cd NMR of CdL4(O3SCF3)2 in solution are consistent with L being bound through sulfur. Reduced-temperature NMR (31P, 77Se, 111Cd, as appropriate) of mixtures of CdL4(O3SCF3)2 and Cd(EPCy3)4(O3SCF3)2 (E = Se, Cy = c-C6H11) and of Cd(EPCy3)4(O3SCF3)2 (E = S, Se) and L in solution provides evidence for various [CdLn(EPCy

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4

Chagas, Rafael César Russo, José Roberto da Silveira Maia, and Vany P. Ferraz. "Synthesis and characterisation of organotin(IV) derivatives of ambidentate ligands containing nitrogen and sulphur donor atoms." Main Group Metal Chemistry 34, no. 5-6 (2011): 131–37. http://dx.doi.org/10.1515/mgmc-2012-0904.

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Abstract A series of organotin(IV) derivatives of bis(pyrimidin-2-ylthio)methane (ptm), 1,2-bis(pyrimidin-2-ylthio)ethane (pte) and 1,6-bis(pyrimidin-2-ylthio)hexane (pth) have been prepared in dichloromethane at room temperature. The 2:1 (M/L) molar ratio compounds have a general formula of [Sn2ClxPh8-xL] (x=2, 4, 6, 8; L=ptm, pte and pth). A 1:1 complex was also obtained by reacting SnClPh3 with pth. The organotin derivatives were characterised by multinuclear NMR (1H, 13C and 119Sn) and infrared spectroscopy, gel permeation chromatography (GPC), microanalysis and melting point. In the triph

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5

Luong, Thi Kim Nga, Pavletta Shestakova, Tzvetan T. Mihaylov, Gregory Absillis, Kristine Pierloot, and Tatjana N. Parac-Vogt. "Multinuclear Diffusion NMR Spectroscopy and DFT Modeling: A Powerful Combination for Unraveling the Mechanism of Phosphoester Bond Hydrolysis Catalyzed by Metal-Substituted Polyoxometalates." Chemistry - A European Journal 21, no. 11 (2015): 4428–39. http://dx.doi.org/10.1002/chem.201405810.

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6

Damude, Leslie C., Philip A. W. Dean, Veeragathy Manivannan, Radhey S. Srivastava, and Jagadese J. Vittal. "Synthesis and multinuclear magnetic resonance study of some tin(IV) complexes of pyridine-2-thiolate and related ligands, and the X-ray structural analysis of Sn(C5H4NS)4•C5H5NS." Canadian Journal of Chemistry 68, no. 8 (1990): 1323–31. http://dx.doi.org/10.1139/v90-204.

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Tin metal reacts with 2,2′-dithiobis (pyridine) in refluxing toluene to give the pyridine-2-thiolate complex Sn(C5H4NS)4, 1a. Multinuclear (77Se, 119Sn) magnetic resonance shows that ligand redistribution occurs in 1a:Sn(EPh)4 (E = S or Se) mixtures to give Sn(EPh)4−x(C5H4NS)x. From the pattern of the 119Sn chemical shifts of these series, compared with that of Sn(EPh)4−x(SR)x (R = simple alkyl or aryl group), the complexes are shown to be five-coordinate Sn(EPh)3(C5H4NS-N,S) when x = 1 and six-coordinate Sn(EPh)4−x(C4H4NS-S)x−2(C5H4NS-N,S)2 when x = 2–4. Reaction of Sn(SPh)2 and (C5H4NS)2 yie

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7

Toma, Monica, Agustín Sánchez, María García-Tasende, et al. "Crystal structure and spectral characterization of dimethylthallium (III) complexes with 2-mercaptonicotinic acid and esters." Open Chemistry 2, no. 3 (2004): 534–52. http://dx.doi.org/10.2478/bf02476206.

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AbstractSynthesis, spectral properties and crystal structure of dimethylthallium(III) complexes with 2-mercaptonicotinic acid (2mna), 2-mercapto-methyl-nicotinate (2mmn), 2-mercapto-ethyl-nicotinate (2men) and 2-mercapto-isopropyl-nicotinate (2min) are reported. The compounds were characterized using IR, multinuclear NMR (1H,13C,205Tl) and mass spectrometry (electrospray, ES-API). The molecular structures of [TlMe2(2mna)]·H2O, (1), [TlMe2(2mmn)], (2), [TlMe2(2men)], (3) and [TlMe2(2min)], (4) were determined by the single-crystal X-ray diffraction. In 1, the monodeprotonate O,S-bidentate ligan

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8

Al-Ktaifani, Mahmoud, and Mwaffak Rukiah. "1,1′-Methylenedipyridinium tetrachloridocuprate(II) and bis[tetrachloridoaurate(III)] hybrid salts by X-ray powder diffraction." Acta Crystallographica Section C Crystal Structure Communications 68, no. 9 (2012): m246—m250. http://dx.doi.org/10.1107/s0108270112031885.

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In order to explore the potential propensity of the 1,1′-methylenedipyridinium dication to form organic–inorganic hybrid ionic compounds by reaction with the appropriate halide metal salt, the organic–inorganic hybrid salts 1,1′-methylenedipyridinium tetrachloridocuprate(II), (C11H12N2)[CuCl4], (I), and 1,1′-methylenedipyridinium bis[tetrachloridoaurate(III)], (C11H12N2)[AuCl4]2, (II), were obtained by treatment of 1,1′-methylenedipyridinium dichloride with CuCl2and Na[AuCl4], respectively. Both hybrid salts were isolated as pure compounds, fully characterized by multinuclear NMR spectroscopy

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9

Schreiber, A., H. Rauter, M. Krumm, S. Menzer, E. C. Hillgeris, and B. Lippert. "Multinuclear Metal Nucleobase Complexes." Metal-Based Drugs 1, no. 2-3 (1994): 241–46. http://dx.doi.org/10.1155/mbd.1994.241.

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Of all properties of metal nucleobase complexes, formation of multinuclear species appears to be an outstanding feature. After a brief introduction into well known polymeric metal nucleobase complexes, three aspects recently Studied in our laboratory will be dealt with in more detail: (i) Heteronuclear complexes derived from trans-[(amine)2Pt(1-MeC)2]2+ (1-MeC=1-methylcytosine). They form, e. g. with Pd(II) or Hg(II), upon single deprotonation of the exocyclic amino group of each 1-MeC ligand, compounds of type trans-[(amine)2Pt(1-MeC-)2MY]n+, displaying Pt-M bond formation. (ii) Cyclic nucleo

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10

Jystad, Amy, and Marco Caricato. "Computational Multinuclear NMR Characterization of Metal-Doped Amorphous Silica Catalysts." Chemistry of Materials 30, no. 21 (2018): 7813–22. http://dx.doi.org/10.1021/acs.chemmater.8b03257.

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11

Iwamoto, M., K. A. Keating, Y. Xu, and L. G. Marzilli. "Application of multinuclear 2D NMR spectroscopy to metal-DNA interactions." Journal of Inorganic Biochemistry 51, no. 1-2 (1993): 549. http://dx.doi.org/10.1016/0162-0134(93)85575-s.

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12

Krawietz, Thomas R., David K. Murray, and James F. Haw. "Alkali Metal Oxides, Peroxides, and Superoxides: A Multinuclear MAS NMR Study." Journal of Physical Chemistry A 102, no. 45 (1998): 8779–85. http://dx.doi.org/10.1021/jp9823190.

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13

Lycka, Antonin. "ChemInform Abstract: Multinuclear NMR of Azo Dyes and Their Metal Complexes." ChemInform 31, no. 48 (2000): no. http://dx.doi.org/10.1002/chin.200048294.

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14

Szabó, Zoltán. "Multinuclear NMR studies of the interaction of metal ions with adenine-nucleotides." Coordination Chemistry Reviews 252, no. 21-22 (2008): 2362–80. http://dx.doi.org/10.1016/j.ccr.2008.03.002.

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15

Nagy, Jànos B. "Multinuclear NMR characterization of microemulsions: Preparation of monodisperse colloidal metal boride particles." Colloids and Surfaces 35, no. 2 (1989): 201–20. http://dx.doi.org/10.1016/0166-6622(89)80296-3.

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16

Mitchell, T. N., and W. Reimann. "Metal(loid) NMR data for 1,1-bis(trimethylmetal)alk-1-enes: Two-bond metal-metal coupling constants." Magnetic Resonance in Chemistry 25, no. 11 (1987): 1019–21. http://dx.doi.org/10.1002/mrc.1260251121.

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17

Schollmeier, Thorsten, Ulrich Englich, Roland Fischer, et al. "Synthesis and Reactivity of Novel Alkali Metal Stannides." Zeitschrift für Naturforschung B 59, no. 11-12 (2004): 1462–70. http://dx.doi.org/10.1515/znb-2004-11-1215.

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Reactivity and side products of reactions of diorganodihydridostannanes (R2SnH2, R = Me, nBu, tBu)) with various alkali metal compounds have been discussed. Alternatively, the synthesis and characterization of a family of novel potassium stannides are described as well. The compounds of type (RR’2Si)R”2SnK (R, R’= Me, Ph; R”= , Me, tBu, Ph) 4 - 9 were synthesized by reaction of potassium hydride with bis(silyl)stannides ((RR’2Si)2SnR”2). All compounds were characterized by multinuclear NMR spectroscopy. In addition, the tri-tert-butyltin compound 3 (LiSntBu3) and the unsymmetrical silyl substi

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18

Wan, Chuan, Suochang Xu, Mary Y. Hu, et al. "Multinuclear NMR Study of the Solid Electrolyte Interface Formed in Lithium Metal Batteries." ACS Applied Materials & Interfaces 9, no. 17 (2017): 14741–48. http://dx.doi.org/10.1021/acsami.6b15383.

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19

Rao, Gyandshwar Kumar, Serge I. Gorelsky, Ilia Korobkov, and Darrin Richeson. "Coinage metal complexes supported by a “PN3P” scaffold." Dalton Transactions 44, no. 44 (2015): 19153–62. http://dx.doi.org/10.1039/c5dt03515e.

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Monovalent group 11 complexes, [2,6-{Ph<sub>2</sub>PNMe}<sub>2</sub>(NC<sub>5</sub>H<sub>3</sub>)]CuBr 1, [2,6-{Ph<sub>2</sub>PNMe}<sub>2</sub>(NC<sub>5</sub>H<sub>3</sub>)]CuOTf 2, [2,6-{Ph<sub>2</sub>PNMe}<sub>2</sub>(NC<sub>5</sub>H<sub>3</sub>)]AgOTf 3, and [2,6-{Ph<sub>2</sub>PNMe}<sub>2</sub>(NC<sub>5</sub>H<sub>3</sub>)](AuCl)<sub>2</sub>4, supported by a neutral PN<sup>3</sup>P ligand have been synthesized and characterized by multinuclear NMR and single crystal X-ray diffraction studies.

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20

Gierczyk, B., G. Schroeder, B. Nowak-Wydra, G. Wojciechowski, and B. Brzezinski. "Multinuclear NMR studies of tris(oxaalkyl) borates and their complexes with some metal cations." Journal of Molecular Structure 513, no. 1-3 (1999): 149–53. http://dx.doi.org/10.1016/s0022-2860(99)00113-1.

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21

Baker, Robert J., Thomas McCabe, John E. O’Brien, and Helen V. Ogilvie. "Thermomorphic metal scavengers: A synthetic and multinuclear NMR study of highly fluorinated ketones and their application in heavy metal removal." Journal of Fluorine Chemistry 131, no. 5 (2010): 621–26. http://dx.doi.org/10.1016/j.jfluchem.2010.02.004.

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22

Singh, Har Lal, and J. B. Singh. "Synthesis and Characterization of New Lead(II) and Organotin(IV) Complexes of Schiff Bases Derived from Histidine and Methionine." International Journal of Inorganic Chemistry 2012 (February 8, 2012): 1–7. http://dx.doi.org/10.1155/2012/568797.

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New Schiff base (HL) ligand is prepared via condensation of isatins and amino acids in 1:1 molar ratio. Metal complexes are prepared and characterized by elemental analysis, molar conductance, electronic, infrared, and multinuclear magnetic resonance (1H NMR, 13C NMR, and 119Sn NMR). The analytical data showed that the ligand acts as bidentate toward metal ions via azomethine nitrogen and carboxylate oxygen by a stoichiometric reaction of metal : ligand (1 : 2) to from metal complexes (Pb(II)(L)2 and Bu2Sn(L)2, where L is the Schiff base ligands of histidine and methionine). The conductivity v

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23

Saponja, Jillian A., and Hans J. Vogel. "Quadrupolar central transition (QCT) and 13C NMR competition studies of metal ion binding to ovotransferrin." Canadian Journal of Chemistry 89, no. 7 (2011): 779–88. http://dx.doi.org/10.1139/v11-019.

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The transferrins are a family of relatively large bilobal proteins that play a major role in the transport of Fe3+, as well as several other physiological and nonphysiological metal ions. Transferrins can also act as antimicrobial agents, by tightly sequestering iron and making it unavailable for bacterial growth. Using a combination of quadrupolar central transition (QCT) metal ion NMR (27Al, 45Sc, 51V, and 71Ga) and 13C NMR, the binding and displacement of a variety of metal ions to ovotransferrin was studied through direct metal ion competition experiments. The metal ions investigated (Al3+

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24

Lucier, Bryan E. G., Yue Zhang та Yining Huang. "Complete multinuclear solid-state NMR of metal-organic frameworks: The case of α-Mg-formate". Concepts in Magnetic Resonance Part A 45A, № 6 (2016): e21410. http://dx.doi.org/10.1002/cmr.a.21410.

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25

Berg, Katja E., Julius Glaser, Michael C. Read, and Imre Toth. "Nonbuttressed Metal-Metal-Bonded Complexes of Platinum and Thallium in Aqueous Solution: Characterization of [(NC)5Pt-Tl(CN)]- by Multinuclear NMR." Journal of the American Chemical Society 117, no. 28 (1995): 7550–51. http://dx.doi.org/10.1021/ja00133a031.

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26

Marzilli, Luigi G. "Application of multinuclear and high field 2d NMR spectroscopy to the evaluation of metal-DNA interactions." Journal of Inorganic Biochemistry 43, no. 2-3 (1991): 425. http://dx.doi.org/10.1016/0162-0134(91)84407-z.

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27

Jones, Dafydd D. L., Samuel Watts та Cameron Jones. "Synthesis and Characterization of Super Bulky β-Diketiminato Group 1 Metal Complexes". Inorganics 9, № 9 (2021): 72. http://dx.doi.org/10.3390/inorganics9090072.

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Sterically bulky β-diketiminate (or Nacnac) ligand systems have recently shown the ability to kinetically stabilize highly reactive low-oxidation state main group complexes. Metal halide precursors to such systems can be formed via salt metathesis reactions involving alkali metal complexes of these large ligand frameworks. Herein, we report the synthesis and characterization of lithium and potassium complexes of the super bulky anionic β-diketiminate ligands, known [TCHPNacnac]− and new [TCHP/DipNacnac]− (ArNacnac = [(ArNCMe)2CH]−) (Ar = 2,4,6-tricyclohexylphenyl (TCHP) or 2,6-diisopropylpheny

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28

Novotný, Jan, Jan Vícha, Pankaj L. Bora, et al. "Linking the Character of the Metal–Ligand Bond to the Ligand NMR Shielding in Transition-Metal Complexes: NMR Contributions from Spin–Orbit Coupling." Journal of Chemical Theory and Computation 13, no. 8 (2017): 3586–601. http://dx.doi.org/10.1021/acs.jctc.7b00444.

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29

Ehrlich, Robert S., and Roberta F. Colman. "Multinuclear NMR studies of the divalent metal binding site of NADP-dependent isocitrate dehydrogenase from pig heart." Biochemistry 28, no. 5 (1989): 2058–65. http://dx.doi.org/10.1021/bi00431a014.

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30

Otting, Gottfried, Barbara A. Messerle, and Linnea P. Soler. "1H-Detected Multinuclear NMR Experiments for the Measurement of Small Heteronuclear Coupling Constants in Transition Metal Complexes." Journal of the American Chemical Society 119, no. 23 (1997): 5425–34. http://dx.doi.org/10.1021/ja963346b.

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31

Apblett, A. W., G. D. Georgieva, and J. T. Mague. "Spectroscopic and thermochemical investigation of alkaline earth metal salts of 2-oximinopropionate." Canadian Journal of Chemistry 75, no. 5 (1997): 483–90. http://dx.doi.org/10.1139/v97-056.

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Alkaline earth metal 2-oximinopropionates were prepared by the reaction of sodium 2-oximinopropionate with the respective metal nitrates or chlorides in water at room temperature. These compounds were characterized by infrared and multinuclear NMR spectroscopy and thermogravimetric analysis. The thermal decomposition of the salts occurs in the range 144-188°C and exhibits a trend towards lower temperature with increasing size of the cation. In all cases, the decomposition yields a metal carbonate. The molecular structure of calcium 2-oximinopropionate hydrate was determined by single-crystal X

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32

Goh, Lai Yoong, and Y. Y. Lim. "Determination of metalmetal bond energies in [CpCr(CO)2L]2 complexes [ L = CO, P(OMe)3] by NMR." Journal of Organometallic Chemistry 402, no. 2 (1991): 209–14. http://dx.doi.org/10.1016/0022-328x(91)83064-b.

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33

Widdifield, Cory M., Frédéric A. Perras, and David L. Bryce. "Solid-state185/187Re NMR and GIPAW DFT study of perrhenates and Re2(CO)10: chemical shift anisotropy, NMR crystallography, and a metal–metal bond." Physical Chemistry Chemical Physics 17, no. 15 (2015): 10118–34. http://dx.doi.org/10.1039/c5cp00602c.

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34

Goh, Lai Yoong, S. K. Khoo, and Y. Y. Lim. "Equilibrium studies on metalmetal bond dissociation in the [(C5Me5)Cr(CO)3]2 dimer by use of NMR spectroscopy." Journal of Organometallic Chemistry 399, no. 1-2 (1990): 115–23. http://dx.doi.org/10.1016/0022-328x(90)80089-i.

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35

Franz, Roman, Clemens Bruhn, and Rudolf Pietschnig. "C2-Symmetric P-Stereogenic Ferrocene Ligands with Heavier Chalcogenophosphinous Acid Ester Donor Sites." Molecules 26, no. 7 (2021): 1899. http://dx.doi.org/10.3390/molecules26071899.

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tert-Butyl-substituted diphospha[2]ferrocenophane was used as a stereochemically confined diphosphane to investigate the addition of various dichalcoganes (R2Ch2; Ch = S, Se, Te and R = Me, Ph). Bischalcogenophosphinous acid esters bearing four soft donor sides were obtained as a mixture of rac and meso diastereomers and characterized by means of multinuclear NMR and X-ray analysis. The coordination chemistry of multidentate ligand 3b was explored toward d10 coinage metal centers (Cu(I), Ag(I), and Au(I)), yielding various bimetallic complexes.

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36

Koo, In Sun, Dildar Ali, Kiyull Yang, et al. "31P NMR and ESI-MS studies of metal ion-phosphorus pesticide residue complexes." Canadian Journal of Chemistry 87, no. 2 (2009): 433–39. http://dx.doi.org/10.1139/v08-178.

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31P NMR and ESI-MS structural studies have been carried out for O,O-dimethylphosphorothioate anion (PA–) interacting with Ag+, Hg2+, and Na+ cations. Evidence is presented for the formation of PA–···Ag+ and PA–···Hg2+ metal complexes and for ionic PA–Na+, with 31P chemical shift values of 43, 40, and 65 ppm, respectively. The 31P chemical shifts for PA–···Ag+ and PA–···Hg2+ complexes exhibit an initial sharp rise as the [Ag+]/[PA] and [Hg2+]/[PA] ratio increases from 0 to 1.0 and 0 to 0.5, respectively, and remain almost constant beyond these ratios. These results indicate the formation of 1:1

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37

Lowe, Mark P., Steven J. Rettig, and Chris Orvig. "Highly Symmetric Group 13 Metal−Phosphinato Complexes: Multinuclear NMR (27Al,31P,71Ga) Determination of Stability Constants at Low pH." Journal of the American Chemical Society 118, no. 43 (1996): 10446–56. http://dx.doi.org/10.1021/ja961633+.

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38

Hwang, Son-Jong, Hyun-Sook Lee, Magnus To, et al. "Probing molecular dynamics of metal borohydrides on the surface of mesoporous scaffolds by multinuclear high resolution solid state NMR." Journal of Alloys and Compounds 645 (October 2015): S316—S319. http://dx.doi.org/10.1016/j.jallcom.2014.12.154.

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39

Clegg, W., M. Capdevila, P. González-Duarte, and J. Sola. "Structural investigation of homonuclear Pt2 and heteronuclear PdPt complexes containing a metal–metal bond bridged by hydrido and sulfido ligands." Acta Crystallographica Section B Structural Science 52, no. 2 (1996): 270–76. http://dx.doi.org/10.1107/s0108768195010640.

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The complex [Pt2(μ-H)(μ-S)(dppe)2](PF6) undergoes a displacive order–disorder transformation at ca 230 K. The low-temperature structure is ordered with one cation–anion pair as the asymmetric unit in space group P21/n. At room temperature the b axis is halved and the space group is P2/n, imposing crystallographic twofold rotation symmetry on both ions; the anion shows major disorder and there is probably minor disorder in the cation, but its internal geometry remains essentially unchanged. The heteronuclear complex [PdPt(μ-H)(μ-S)(dppe)2](PF6) is isostructural with the Pt2 complex at room temp

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40

Weber, Lothar, Klaus Reizig, and Georg Meine. "Übergangsmetall-substituierte Acylphosphane und Phosphaalkene, VI [1] Phosphaalkenyl-Eisen- und -Rutheniumkomplexe mit Metall-Kohlenstoffkoordination / Transition Metal Substituted Acylphosphines and Phosphaalkenes, VI [1] Phosphaalkenyl Iron and Ruthenium Complexes with Metal-Carbon Coordination." Zeitschrift für Naturforschung B 40, no. 12 (1985): 1698–702. http://dx.doi.org/10.1515/znb-1985-1216.

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Abstract Treatment of the cationic complexes [(η5-C5Me5)M(CO)3]⊕BF4⊖ (M = Fe, Ru) (1a , b) with the bulky lithium silyl phosphide LiP(Ar')(SiMe3) (Ar' = 2,4,6-tri-fert-butylphenyl) (2) leads to the phosphaalkenyl complexes (η5-C5Me5)(CO)2M - C(OSiMe3) = P ~ Ar' (4a, b). The presence of C = P double bonds in 4a, b was ascertained by 13C- and 31P NMR spectra. The geometry at the C = P bond was also deduced from the analysis o f the NMR spectra (1H , 13C, 31P)

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41

Gordon, Christopher P., Satoru Shirase, Keishi Yamamoto, Richard A. Andersen, Odile Eisenstein, and Christophe Copéret. "NMR chemical shift analysis decodes olefin oligo- and polymerization activity of d0group 4 metal complexes." Proceedings of the National Academy of Sciences 115, no. 26 (2018): E5867—E5876. http://dx.doi.org/10.1073/pnas.1803382115.

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d0metal-alkyl complexes (M = Ti, Zr, and Hf) show specific activity and selectivity in olefin polymerization and oligomerization depending on their ligand set and charge. Here, we show by a combined experimental and computational study that the13C NMR chemical shift tensors of the α-carbon of metal alkyls that undergo olefin insertion signal the presence of partial alkylidene character in the metal–carbon bond, which facilitates this reaction. The alkylidene character is traced back to the π-donating interaction of a filled orbital on the alkyl group with an empty low-lying metal d-orbital of

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42

Huang, Jing, Daniel Häussinger, Urs Gellrich, Wolfgang Seiche, Bernhard Breit, and Markus Meuwly. "Hydrogen-Bond and Solvent Dynamics in Transition Metal Complexes: A Combined Simulation and NMR-Investigation." Journal of Physical Chemistry B 116, no. 49 (2012): 14406–15. http://dx.doi.org/10.1021/jp309412r.

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Hidai, Masanobu, and Yasushi Mizobe. "Research inspired by the chemistry of nitrogenase Novel metal complexes and their reactivity toward dinitrogen, nitriles, and alkynes." Canadian Journal of Chemistry 83, no. 4 (2005): 358–74. http://dx.doi.org/10.1139/v05-016.

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Summarized here are our continuous studies of the last three decades concerning syntheses of new types of complexes learned from nitrogenase and their reactivites toward dinitrogen, nitriles, and alkynes. For Mo and W dinitrogen complexes with tertiary phosphine coligands, a variety of their intriguing reactivities have been demonstrated, and novel transformations of the N2 ligands into numerous nitrogen-containing ligands and compounds have been developed. The C≡N bond cleavage of certain nitriles also proceeds on the Mo site surrounded by tertiary phosphines. Stimulated by the sophisticated

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Martin, Richard A., Helen L. Twyman, Gregory J. Rees, et al. "A structural investigation of the alkali metal site distribution within bioactive glass using neutron diffraction and multinuclear solid state NMR." Physical Chemistry Chemical Physics 14, no. 35 (2012): 12105. http://dx.doi.org/10.1039/c2cp41725a.

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Taj, Muhammad Babar, Muneera D. F. Alkahtani, Uzma Ali, et al. "New Heteroleptic 3D Metal Complexes: Synthesis, Antimicrobial and Solubilization Parameters." Molecules 25, no. 18 (2020): 4252. http://dx.doi.org/10.3390/molecules25184252.

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The microbial resistance to current antibiotics is increasing day by day, which in turn accelerating the development of new effective drugs. Several studies have proved the high antimicrobial potential of the interaction of several organic ligands with a variety of metal ions. In the present study, a conventional method has been adopted in the synthesis of twelve new heteroleptic complexes of cobalt (II), nickel (II), copper (II) and zinc (II) using three aldimines, namely, (HL1 ((E)-2-((4-chloro-2-hydroxybenzylidene)amino)-3,4-dimethyl-5-phenylcyclopent-2-en-1-one), HL2 ((Z)-3-((4-chlorobenzy

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46

Soria, Lorena, Paloma Ovejero, Mercedes Cano, et al. "Coordination behaviour of new dipyridylpyrazole ligands towards ZnCl2and PdCl2fragments. Crystalline structural characterization and multinuclear NMR studies as evidence of linkage and conformational isomers." RSC Adv. 4, no. 18 (2014): 9383–94. http://dx.doi.org/10.1039/c3ra45821k.

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Deacon, Glen B., Peter C. Junk, and Rory P. Kelly. "Alkaline Earth Metal Organoamide Complexes Displaying Close Ae–F(C) (Ae = Ca, Mg) Interactions." Australian Journal of Chemistry 66, no. 10 (2013): 1288. http://dx.doi.org/10.1071/ch13228.

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Protolysis of [Ca{N(SiMe3)2(thf)2] (thf = tetrahydrofuran) with the N,N-dialkyl-N′-2,3,5,6-tetrafluorophenylethane-1,2-diamines, p-HC6F4NH(CH2)2NR2 (LRH; R = Me or Et), yields [Ca(p-HC6F4N(CH2)2NR2)2(thf)2], whilst protolysis of di-n-butylmagnesium by the same amines yields [Mg(p-HC6F4N(CH2)2NR2)2] complexes. X-Ray crystal structures show that the calcium derivatives contain eight-coordinate calcium atoms, with tridentate (N,N′,o-F) coordination of the organoamide ligands and cisoid thf donors. It is noteworthy that the Ca–F(C) bond lengths are shorter than the Ca–NR2 bond lengths. By contrast

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Bachmann, Bernd, Gerhard Baum, Jürgen Heck, Werner Massa та Bernd Ziegler. "Cp′—X—Cp′-überbrückte μ-Cyclooctatetraen- und -trien-Zweikernkomplexe des Chroms sowie Vanadiums (Cp′ = η5-C5H4, X = CH2, SiMe2, GeMe2) / Binuclear Cp′–X–Cp′-Bridged μ-Cyclooctatetraene and -triene Complexes of Chromium as well as Vanadium (Cp′ = η5-C5H4, X = CH2, SiMe2, GeMe2)". Zeitschrift für Naturforschung B 45, № 2 (1990): 221–38. http://dx.doi.org/10.1515/znb-1990-0217.

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Synfacial binuclear μ-Cot complexes of the general formula X(Cp′M)2— μ-Cot with Cp′—X—Cp′ as an additional bridging group (M = V, Cr; Cot = cyclooctatetraene) can be prepared by a one-pot reaction of the appropriate metal dichlorides with K2Cot and Li2[(C5H4)2X]. For M = V the vanadocenophanes {V(Cp'2X)}2 (X = SiMe2, GeMe2) are isolated as by-products. Depending on the conditions of work-up for M = Cr µ-(σ:η3:η2-cyclooctatriene) complexes can be obtained instead of the μ-Cot compounds. X-ray structure determinations of several μ-Cot species attest only a poor influence of the bridging group X

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Réant, Benjamin L. L., Victoria E. J. Berryman, Annabel R. Basford, et al. "29Si NMR Spectroscopy as a Probe of s- and f-Block Metal(II)–Silanide Bond Covalency." Journal of the American Chemical Society 143, no. 26 (2021): 9813–24. http://dx.doi.org/10.1021/jacs.1c03236.

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50

Bley, B., M. Bodenbinder, G. Balzer, et al. "Synthesis and spectroscopic characterization of bis(trifluorophosphinyl)-gold(I) undecafluorodiantimonate(V) [Au(PF3)2][Sb2F11]." Canadian Journal of Chemistry 74, no. 11 (1996): 2392–94. http://dx.doi.org/10.1139/v96-267.

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The synthesis of [Au(PF3)2][Sb2F11], the first example of a linear, thermally stable metal bis(trifluorophosphine) complex is achieved by CO substitution of [Au(CO)2][Sb2F11] by PF3. The [Au(PF3)2]+ cation can also be generated by reductive phosphorylation by an excess of PF3 in fluorosulfuric acid. Spectroscopic characterization involves 19F and 31P NMR in HSO3F and SO2 solution including spectral simulation by the WIN-DAISY method and FT-IR and Raman spectra. Spectroscopic evidence suggests that the metal–ligand bond involves predominantly σ-bonding with drastically reduced π-back-donation.

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