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Journal articles on the topic 'Valence isomerism'

Author: Grafiati

Published: 18 April 2022

Last updated: 25 April 2022

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1

Diederich, Fran�ois, Lyle Isaacs, and Douglas Philp. "Valence isomerism and rearrangements in methanofullerenes." Journal of the Chemical Society, Perkin Transactions 2, no. 3 (1994): 391. http://dx.doi.org/10.1039/p29940000391.

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2

Zhu, Rong, and Timothy M. Swager. "Polymer Valence Isomerism: Poly(Dewar-o-xylylene)s." Journal of the American Chemical Society 140, no. 15 (2018): 5211–16. http://dx.doi.org/10.1021/jacs.8b01106.

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3

DIEDERICH, F., L. ISAACS, and D. PHILP. "ChemInform Abstract: Valence Isomerism and Rearrangements in Methanofullerenes." ChemInform 25, no. 27 (2010): no. http://dx.doi.org/10.1002/chin.199427049.

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4

Fabian, Jürgen, and Peter Birner. "A theoretical study of the disulfide/dithione valence isomerism." Collection of Czechoslovak Chemical Communications 53, no. 9 (1988): 2096–115. http://dx.doi.org/10.1135/cccc19882096.

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According to MNDO calculations on 1,2-dithiete (IIIa), 1,2-dithiin (IVa) and 3,4-dimethylene-1,2-dithiane (Va) the closed-ring compounds are thermodynamically more stable than the open-chain compounds whereas the reverse holds for 4-methylene-1,2-dithiole (VIa). Substitution of the exocyclic CH2 group of VIa by O, S, NH, and OH+ stabilizes its cyclic mesoionic structure. The low triplet state energy of VIa and of some derivatives relative to the lowest singlet state energy signalizes the biradicaloid nature of these electronic structures. Replacement of hydrogen of the methine groups adjacent

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5

Toyota, Kozo, Hiroaki Takahashi, Kazuho Shimura, and Masaaki Yoshifuji. "Valence Isomerism between Sterically Protected MethylenephosphineP-Sulfide and 1,2-Thiaphosphirane." Bulletin of the Chemical Society of Japan 69, no. 1 (1996): 141–45. http://dx.doi.org/10.1246/bcsj.69.141.

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6

Tejedor, García-Tellado, Delgado-Hernández, Diana-Rivero, and Díaz-Díaz. "Recent Advances in the Synthesis of 2H-Pyrans." Molecules 24, no. 16 (2019): 2904. http://dx.doi.org/10.3390/molecules24162904.

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In this review, we discuss the nature of the different physicochemical factors affecting the valence isomerism between 2H-pyrans (2HPs) and 1-oxatrienes, and we describe the most versatile synthetic methods reported in recent literature to access to 2HPs, with the only exception of 2HPs fused to aromatic rings (i.e., 2H-chromenes), which are not included in this review.

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7

Schulman, Jerome M., and Raymond L. Disch. "Benzocyclobutene and benzo[1,2:4,5]dicyclobutene: the possibility of valence isomerism." Journal of the American Chemical Society 115, no. 24 (1993): 11153–57. http://dx.doi.org/10.1021/ja00077a012.

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8

Hofmann, Alexander, Tobias Tröster, Thomas Kupfer, and Holger Braunschweig. "Monomeric Cp3tAl(i): synthesis, reactivity, and the concept of valence isomerism." Chemical Science 10, no. 11 (2019): 3421–28. http://dx.doi.org/10.1039/c8sc05175e.

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9

Müller, Fabian, Julius B. Stückrath, Florian A. Bischoff, et al. "Valence and Structure Isomerism of Al2FeO4+: Synergy of Spectroscopy and Quantum Chemistry." Journal of the American Chemical Society 142, no. 42 (2020): 18050–59. http://dx.doi.org/10.1021/jacs.0c07158.

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10

Brown, Alan B., Scott E. McKay, and Paul Kiprof. "An ab initio study of annulation effects on the valence isomerism of benzene." Journal of Molecular Structure: THEOCHEM 419, no. 1-3 (1997): 185–89. http://dx.doi.org/10.1016/s0166-1280(97)00193-0.

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11

SCHULMAN, J. M., and R. L. DISCH. "ChemInform Abstract: Benzocyclobutene and Benzol(1,2:4,5)dicyclobutene: The Possibility of Valence Isomerism." ChemInform 25, no. 10 (2010): no. http://dx.doi.org/10.1002/chin.199410044.

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12

Zhao, Xin-Hua, Dong Shao, Jia-Tao Chen, et al. "Spin and valence isomerism in cyanide-bridged {FeIII2MII} (M = Fe and Co) clusters." Dalton Transactions 50, no. 28 (2021): 9768–74. http://dx.doi.org/10.1039/d1dt01298c.

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Two isostructural cyanide-bridged {Fe<sub>2</sub>M} (M = Fe (1), Co (2)) clusters were investigated. Both 1 and 2 exhibit reversible spin transition due to SCO for 1 while ETCST for 2 with additional irreversible susceptibility changes at high temperatures.

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13

Mandal, Nilangshu, Ankita Das, Chandralekha Hajra, and Ayan Datta. "Stereoelectronic and dynamical effects dictate nitrogen inversion during valence isomerism in benzene imine." Chemical Science 13, no. 3 (2022): 704–12. http://dx.doi.org/10.1039/d1sc04855d.

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14

TOYOTA, K., H. TAKAHASHI, K. SHIMURA, and M. YOSHIFUJI. "ChemInform Abstract: Valence Isomerism Between Sterically Protected Methylenephosphine P- Sulfide (II) and 1,2-Thiaphosphirane." ChemInform 27, no. 17 (2010): no. http://dx.doi.org/10.1002/chin.199617170.

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15

Moderhack, Dietrich, and Dirk Decker. "Pyrrole Ring Opening in 5-Nitroso- and 5-Phenylazo-1H-pyrrolotetrazoles --- An Unexpected Valence Isomerism." HETEROCYCLES 37, no. 2 (1994): 683. http://dx.doi.org/10.3987/com-93-s68.

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16

Panja, Anangamohan, Narayan Ch Jana, Antonio Bauzá, Antonio Frontera, and Corine Mathonière. "Solvent-Triggered Cis/Trans Isomerism in Cobalt Dioxolene Chemistry: Distinguishing Effects of Packing on Valence Tautomerism." Inorganic Chemistry 55, no. 17 (2016): 8331–40. http://dx.doi.org/10.1021/acs.inorgchem.6b00402.

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17

HIRSCHMANN, TH, M. BRACK, B. MONTAG, P. G. REINHARD, and J. MEYER. "SHAPE ISOMERISM OF SODIUM CLUSTERS WITH QUADRUPOLE, OCTUPOLE, AND HEXADECAPOLE DEFORMATIONS IN THE STRUCTURE-AVERAGED JELLIUM MODEL." Surface Review and Letters 03, no. 01 (1996): 229–33. http://dx.doi.org/10.1142/s0218625x96000450.

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Multidimensional deformation energy surfaces of singly charged sodium clusters with 8≤ Z ≤50 valence electrons have been calculated including quadrupole, octupole, and hexadecapole shapes for the ionic background. We solve the Kohn-Sham equations in the local-density approximation with preserved axial symmetry on a two-dimensional lattice. In addition to the diffusivity of the jellium surface, the structure-averaged jellium model (SAJM) which yields the empirical bulk properties and surface tension of sodium is successfully applied to deformed systems. Discussing the systematics of shape trans

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18

Yang, Yu-Ying, Xiao-Quan Zhu, Sheng-Min Hu, et al. "Different Degrees of Electron Delocalization in Mixed Valence Ru-Ru-Ru Compounds by Cyanido-/Isocyanido-Bridge Isomerism." Angewandte Chemie 130, no. 43 (2018): 14242–46. http://dx.doi.org/10.1002/ange.201806157.

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19

MODERHACK, D., and D. DECKER. "ChemInform Abstract: Pyrrole Ring Opening in 5-Nitroso- and 5-Phenylazo-1H- pyrrolotetrazoles. An Unexpected Valence Isomerism." ChemInform 25, no. 27 (2010): no. http://dx.doi.org/10.1002/chin.199427124.

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20

Yang, Yu-Ying, Xiao-Quan Zhu, Sheng-Min Hu, et al. "Different Degrees of Electron Delocalization in Mixed Valence Ru-Ru-Ru Compounds by Cyanido-/Isocyanido-Bridge Isomerism." Angewandte Chemie International Edition 57, no. 43 (2018): 14046–50. http://dx.doi.org/10.1002/anie.201806157.

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21

Vazdar, Mario, and Mirjana Eckert-Maksić. "Multireference Configuration Interaction Methods – An Application to the Valence Isomerism in Cyclobutadieno-p-benzoquinone and its Diprotonated Form." Croatica Chemica Acta 88, no. 4 (2015): 495–503. http://dx.doi.org/10.5562/cca2770.

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22

Bernhardt, Paul V., Brendan P. Macpherson, and Manuel Martinez. "The influence of cis/trans isomerism on the physical properties of a cyano-bridged dinuclear mixed valence complex." Journal of the Chemical Society, Dalton Transactions, no. 7 (2002): 1435. http://dx.doi.org/10.1039/b110461f.

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23

Havenith, Remco W. A., Leonardus W. Jenneskens, and Joop H. van Lenthe. "The effect of syn–anti isomerism on the lowest valence transitions of 1,1′-bicyclohexylidene. An ab initio MRDCI investigation." Chemical Physics Letters 282, no. 1 (1998): 39–48. http://dx.doi.org/10.1016/s0009-2614(97)01183-4.

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24

Ohe, Kouichi, Tomomi Yokoi, Koji Miki, Fumiaki Nishino, and Sakae Uemura. "Chromium- and Tungsten-Triggered Valence Isomerism ofcis-1-Acyl-2-ethynylcyclopropanes via [3,3]Sigmatropy of (2-Acylcyclopropyl)vinylidene−Metal Intermediates." Journal of the American Chemical Society 124, no. 4 (2002): 526–27. http://dx.doi.org/10.1021/ja017037j.

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25

Charkin, O. P., D. O. Charkin, N. M. Klimenko, and A. M. Mebel. "A theoretical study of isomerism in doped aluminum XAl12 clusters (X=B, Al, Ga, C, Si, Ge) with 40 valence electrons." Chemical Physics Letters 365, no. 5-6 (2002): 494–504. http://dx.doi.org/10.1016/s0009-2614(02)01512-9.

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26

Rastelli, Augusto, Enzo Gallinella, and Marina Burdisso. "Rotational isomerism, structure and vibrational assignment of methoxyallene: joint IR and Raman investigation and non-empirical MO-SCF and valence force field calculations." Journal of Molecular Structure 196 (May 1989): 79–99. http://dx.doi.org/10.1016/0022-2860(89)85007-0.

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27

Isobe, Hiroshi, Mitsuo Shoji, Takayoshi Suzuki, Jian-Ren Shen, and Kizashi Yamaguchi. "Spin, Valence, and Structural Isomerism in the S3 State of the Oxygen-Evolving Complex of Photosystem II as a Manifestation of Multimetallic Cooperativity." Journal of Chemical Theory and Computation 15, no. 4 (2019): 2375–91. http://dx.doi.org/10.1021/acs.jctc.8b01055.

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28

Ohe, Kouichi, Tomomi Yokoi, Koji Miki, Fumiaki Nishino, and Sakae Uemura. "ChemInform Abstract: Chromium- and Tungsten-Triggered Valence Isomerism of cis-1-Acyl-2-ethynylcyclopropanes via [3,3]Sigmatropy of (2-Acylcyclopropyl)vinylidene-Metal Intermediates." ChemInform 33, no. 28 (2010): no. http://dx.doi.org/10.1002/chin.200228063.

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29

Archambault, Christine, Robert Bender, Pierre Braunstein, Yves Dusausoy та Richard Welter. "Reactions of trinuclear platinum clusters with electrophiles: ionisation isomerism with [Pt3(μ2-I)(μ-PPh2)2(PPh3)3]I and [Pt3(μ-PPh2)2I2(PPh3)3]. Structures of [Pt3(μ2-Cl)(μ-PPh2)2(PPh3)3]PF6, [Pt3(μ-PPh2)2I2(PPh3)3] and of the Pt–Ag cluster [Pt3{μ3-AgBF4}(μ2-I)(μ-PPh2)2(PPh3)3]BF4". Dalton Trans. 43, № 23 (2014): 8609–19. http://dx.doi.org/10.1039/c4dt00090k.

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30

Melník, Milan, Peter Mikuš, and Clive Edward Holloway. "Platinum organometallic complexes: classification and analysis of crystallographic and structural data for dimeric complexes." Reviews in Inorganic Chemistry 34, no. 1 (2014): 25–90. http://dx.doi.org/10.1515/revic-2013-0010.

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AbstractThis review covers over 260 examples of dimeric organoplatinum complexes. Platinum is predominantly found in the oxidation states +2 and +4, but with some examples of 0, +1, +2.5, +3, and of mixed-valence as well. A number of coordination state geometries are observed, of which the most common is essentially square-planar at Pt(II), a distorted octahedral at Pt(IV), and some examples of trigonal planar and trigonal bipyramidal as well. The most common ligands are methyl (Me), carbonyl and PX3. The shortest Pt-Pt bond distance is 245.1(1) pm. The mean Pt-Pt bond distance increases in th

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31

Novikov, Mikhail S., Ilia A. Smetanin, Alexander F. Khlebnikov, Nikolai V. Rostovskii, and Dmitry S. Yufit. "Synthesis of electron-poor 4-halo-2-azabuta-1,3-dienes by Rh(II)-catalyzed diazo ester–azirine coupling. 2-Azabuta-1,3-diene-2,3-dihydroazete valence isomerism." Tetrahedron Letters 53, no. 43 (2012): 5777–80. http://dx.doi.org/10.1016/j.tetlet.2012.08.063.

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32

Radeglia, Reiner, Helmut Poleschner, and Werner Schroth. "NMR-spektroskopische Untersuchung des Problems der Valenzisomerie zwischen 1,2-Dithiin und (Z)-But-2-en-1,4-dithion / NMR Spectroscopic Investigation Concerning the Problem of Valence Isomerism between 1,2-Dithiine and (Z)-But-2-ene-1,4-dithione." Zeitschrift für Naturforschung B 43, no. 5 (1988): 605–10. http://dx.doi.org/10.1515/znb-1988-0519.

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3,6-Diaryl-1,2-dithiines and their precursors, (Z,Z)-1,4-bis(organylthio)-buta-1,3-dienes, are investigated by 1H and 13C NMR spectroscopy. The chemical shifts and coupling constants, which are relevant to the investigated problem, are determined and assigned, respectively, by different techniques (shift increments, spectrum simulation, heteronuclear 2D J-resolved and heteronuclear shift correlated 2D NMR spectra, anomalous off-resonance splittings and selective decoupling experiments). The NMR parameters are discussed in relation to the molecular structure. The 13C shift values prove the ring

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33

Salsman, J. Catherine, Clifford P. Kubiak, and Tasuku Ito. "Mixed Valence Isomers." Journal of the American Chemical Society 127, no. 8 (2005): 2382–83. http://dx.doi.org/10.1021/ja042351+.

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34

Ota, Kei, and Rei Kinjo. "Inorganic Benzene Valence Isomers." Chemistry – An Asian Journal 15, no. 17 (2020): 2558–74. http://dx.doi.org/10.1002/asia.202000535.

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35

Charkin, Oleg P., Dmitry O. Charkin, Nina M. Klimenko, and Alexander M. Mebel. "A theoretical study of isomerism in doped aluminum MAl12 and MAl12X12 clusters with 40 and 50 valence electronsElectronic supplementary information (ESI) available: Selected geometric parameters of clusters. See http://www.rsc.org/suppdata/fd/b2/b211114d/." Faraday Discussions 124 (2003): 215. http://dx.doi.org/10.1039/b211114d.

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36

Mbuvi, Harun M., and L. Keith Woo. "Addition of carbenes derived from aryldiazoacetates to arenes using chloro(tetraphenylporphyrinato)iron as catalyst." Journal of Porphyrins and Phthalocyanines 13, no. 01 (2009): 136–52. http://dx.doi.org/10.1142/s1088424609000036.

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Chloro(tetraphenylporphyrinato)iron, Fe ( TPP ) Cl , is an active catalyst for the Büchner addition of para-substituted methyl 2-phenyldiazoacetates, 1a–d, to substituted benzenes. Yields greater than 70% have been achieved at temperatures ranging from 60–100°C. Reactions of substituted methyl 2-phenyldiazoacetates with benzene gave rapidly equilibrating mixtures of norcaradienecycloheptatriene valence isomers, 2a–d/2′a–d, in yields over 70%. Treatment of chlorobenzene with methyl 2-phenyldiazoacetate produced a regio-isomeric mixture of 7-carbomethoxy-2-chloro-7-phenylnorcaradiene/7-carbometh

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37

Correa, Ricardo Andres, Naiyong Jing, and David M. Lemal. "Interrelationships among C6F10 valence isomers." Journal of Organic Chemistry 58, no. 23 (1993): 6406–9. http://dx.doi.org/10.1021/jo00075a040.

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38

Jansen, Helen, J. Chris Slootweg, and Koop Lammertsma. "Valence isomerization of cyclohepta-1,3,5-triene and its heteroelement analogues." Beilstein Journal of Organic Chemistry 7 (December 21, 2011): 1713–21. http://dx.doi.org/10.3762/bjoc.7.201.

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The valence isomerization of the all-carbon and heteroelement analogues of cyclohepta-1,3,5-triene into the corresponding bicyclo[4.1.0]hepta-2,4-dienes is reviewed to show the impact of the heteroatom on the stability of both valence isomers. The focus is on the parent systems and their synthetic applications.

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39

Murata, Ichiro, Yoshixkazu Sugihara, Takashi Sugimura, and Shigeharu Wakabayashi. "Valence isomers of azulene and heptalene." Tetrahedron 42, no. 6 (1986): 1745–56. http://dx.doi.org/10.1016/s0040-4020(01)87592-x.

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40

Chatterjee, Subhojyoti, and Feng Wang. "Electronic structures of hexane isomers studied using quantum mechanics and graph theory." Journal of Theoretical and Computational Chemistry 14, no. 02 (2015): 1550014. http://dx.doi.org/10.1142/s0219633615500145.

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Electronic and topological properties of hexane ( C 6 H 14) and its five geometric isomers are systematically studied quantum mechanically using several techniques such as positron–electron annihilation gamma-ray spectra, C1s binding energy spectra and carbon nuclear magnetic resonance (NMR) spectra, as well as information derived from graph theory. It is revealed that the Doppler-shift in the gamma-ray spectra of the hexane isomers is in the vicinity of the n-hexane molecule with small structural dependency, in agreement with the fact that the measured Doppler-shifts of other linear alkanes a

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41

Barresi, Elisabetta, Iogann Tolbatov, Tiziano Marzo, et al. "Two mixed valence diruthenium(ii,iii) isomeric complexes show different anticancer properties." Dalton Transactions 50, no. 27 (2021): 9643–47. http://dx.doi.org/10.1039/d1dt01492g.

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42

Argyle, Victoria J., Marina Roxburgh, and Lyall R. Hanton. "Use of the oxime–oximato binding mode to stabilise mixed valence copper iodide polymer networks using dipyridyl ketone oxime ligands." CrystEngComm 16, no. 28 (2014): 6345–53. http://dx.doi.org/10.1039/c3ce42481b.

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Coordination polymers formed from copper iodide and four isomeric dipyridyl ketone oxime ligands showed the importance the oxime–oximato bridge on the formation of mixed valence Cu(i)/Cu(ii) polymers.

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43

Crutchley, Robert J. "Charge-Transfer Isomers and Mixed-Valence Properties." Angewandte Chemie International Edition 44, no. 40 (2005): 6452–54. http://dx.doi.org/10.1002/anie.200501598.

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44

Bickelhaupt, Friedrich, and Willem H. de Wolf. "Bridged valence isomers of benzene and cyclophanes." Recueil des Travaux Chimiques des Pays-Bas 107, no. 7-8 (2010): 459–78. http://dx.doi.org/10.1002/recl.19881070702.

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45

Douki, T., and E. Sage. "Dewar valence isomers, the third type of environmentally relevant DNA photoproducts induced by solar radiation." Photochemical & Photobiological Sciences 15, no. 1 (2016): 24–30. http://dx.doi.org/10.1039/c5pp00382b.

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Dewar valence isomers are mutagenic DNA lesions produced by photoisomerisation of (6-4) photoproducts. Their efficient formation upon exposure to a combination of UVB and UVA makes them biologically and environmentally relevant DNA damage.

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46

Grainger, James, V. Vikram Reddy, and Donald G. Patterson. "Hexachlorodibenzo-p-Dioxin Isomer Differentiation by Capillary Gas Chromatography Fourier Transform Infrared Spectroscopy." Applied Spectroscopy 44, no. 1 (1990): 41–46. http://dx.doi.org/10.1366/0003702904085903.

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Vapor-phase infrared spectra of the 10 hexachlorodibenzo- p-dioxin isomers were recorded at low microgram concentrations. A unique infrared spectrum was observed for each chromatographically separated or spectrally subtracted mixture component. The structures for individual isomers in each isomer pair were assigned by qualitative valence bond evaluations and empirically derived quantitative estimations of ether linkage asymmetric stretching frequencies and by correlations with characteristic aromatic skeletal stretching vibration patterns.

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47

Grainger, James, V. Vikram Reddy, and Donald G. Patterson. "Pentachlorodibenzo-p-dioxin Isomer Differentiation by Capillary Gas Chromatography Fourier Transform Infrared Spectroscopy." Applied Spectroscopy 42, no. 5 (1988): 800–806. http://dx.doi.org/10.1366/0003702884429166.

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Reference infrared vapor-phase spectra of the 14 pentachlorodibenzo-p-dioxin (PnCDD) isomers were recorded at low microgram concentrations. A unique infrared spectrum corresponding to each chromatographically separated or spectrally subtracted mixture component was observed. The structures for individual isomers in each isomer pair were assigned by qualitative valence-bond evaluations and empirically derived quantitative estimations of ether linkage asymmetric stretching frequencies [ vcoc(asym)] Correlations between calculated ether linkage (C-O-C) bond angles and vcoc(asym) indicate the exis

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48

Kutsybala, Daria S., Alexander V. Shokurov, Alexander G. Martynov, et al. "Interface Asymmetry Induced and Surface Pressure Controlled Valence Tautomerism in Monolayers of bis-Phthalocyaninates of Lanthanides." Symmetry 14, no. 2 (2022): 340. http://dx.doi.org/10.3390/sym14020340.

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Supramolecular systems based on transition metal complexes capable of reversible redox isomerization due to intramolecular electron transfer are one of the most interesting objects from the viewpoint of molecular switches’ design. In the present work, a comparative analysis of valence transformation of lanthanide complexes (Sm, Er, Tm and Yb) with donor-substituted bis-phthalocyaninates occurring during the formation and compression–extension of Langmuir monolayers was carried out using data of UV–Vis–NIR spectroscopy. It is shown that the numerical values of the Q-band positions in the absorp

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49

Priyakumar, U. Deva, and G. Narahari Sastry. "Theoretical Study of Silabenzene and Its Valence Isomers." Organometallics 21, no. 7 (2002): 1493–99. http://dx.doi.org/10.1021/om011001i.

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50

Warren, D. Scott, and Benjamin M. Gimarc. "Valence isomers of benzene and their relationship to isomers of isoelectronic P6." Journal of the American Chemical Society 114, no. 13 (1992): 5378–85. http://dx.doi.org/10.1021/ja00039a058.

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