Changing Atomic Structure by Shock Compression

Бацанов, С. С.

doi:10.1007/978-1-4757-3969-5_4

Cited by 2 publications

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References 79 publications

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“…Атом сурьмы выходит из экваториальной плоскости [ Наличие внутримолекулярных взаимодействий между атомом сурьмы и карбонильным атомом кислорода является неотъемлемой характеристикой карбоксилатов тетраарилсурьмы . Величина контактов SbO=C в структурах соединений 1 и 2 составляет 3,189(2) и 3,509(2) Å соответственно, что меньше суммы ван-дер-ваальсовых радиусов сурьмы и кислорода (3,70 Å) [46]. Такое взаимодействие вызывает увеличение одного экваториального угла (129,38(9)° (1), 130,17(6)° (2)), расположенного со стороны внутримолекулярного контакта.…”

Section: рис 1 строение соединенияunclassified

Synthesis and Structure Features of Tetraphenylantimony 2,3-Difluoro- and 2,3,4,5,6-Pentafluorobenzoate

Ефремов¹

2020

Chem

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Tetraphenylantimony 2,3-difluorobenzoate (1) and tetraphenylantimony 2,3,4,5,6-pentafluorobenzoate (2) was obtained by the interaction of pentaphenylantimony with 2,3-difluorobenzoic and 2,3,4,5,6-pentafluorobenzoic acids in benzene with a yield of up to 98 %. The compounds were also synthesized by the ligand redistribution reaction between pentaphenylantimony and triphenylantimony dicarboxylates. The compounds have been identified by IR spectroscopy and X-ray diffraction analysis. According to the X-ray diffraction data, the antimony atoms in compounds 1 and 2 have a distorted trigonal-bipyramidal coordination with the oxygen atom in axial positions. X-ray diffraction analysis was performed on a D8 QUEST diffractometer (Bruker). The crystallographic parameters of the unit cell of the compounds: 1 space group Р1 ̅, а = 9.857(5), b = 10.154(7), c = 14.362(11) Å, α = 83.74(4)°, β = 82.59(3), γ = 68.34(2)°, V = 1321.9(16) Å3, ρcalc = 1.475 g/cm3, Z = 2; 2 space group Р21/с, а = 16.186(9), b = 8.771(6), c = 20.413(13) Å, α = 90.00°, β = 113.073(17), γ = 90.00°, V = 2666(3) Å3, ρcalc = 1.597 g/cm3, Z = 4. The OSbO axial angles are slightly different and amount to 177.90(5)º in 1 and 179.00(5)º in 2. The sums of the CSbC equatorial angles are 356.89(9)º (1), 355.85(7)º (2). The Sb–Ceq distances in compounds 1 and 2 are 2.116(2), 2.119(2), 2.118(2) and 2.1073(17), 2.1158(18), 2.1152(19) Å respectively, which are significantly shorter than the Sb–Сax bond lengths (2.169(2) and 2.1617(19) Å). The organization of molecules in the crystals of compounds is due to hydrogen bonds and CHπ-interactions of the aryl and carboxyl ligands. The main difference between structures 1 and 2 is the different Sb–O bond lengths (2.2864(18) and 2.3168(18) Å), which is due to an increase in the electronegativity of the carboxyl ligand in 2, caused by the presence of five electronegative fluorine atoms in the benzoate substituent. Complete tables of atom coordinates, bond lengths and valence angles are deposited at the Cambridge Crystallographic Data Center (No. 1980908 (1); 1977189 (2); deposit@ccdc.cam.ac.uk; http://www.ccdc.cam.ac.uk/data_request/cif).

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Section: рис 1 строение соединенияunclassified

Synthesis and Structure Features of Tetraphenylantimony 2,3-Difluoro- and 2,3,4,5,6-Pentafluorobenzoate

Ефремов¹

2020

Chem

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“…При этом значения индивидуальных углов составляют 115,97(15)°, 116,70 (14) В структурах дикарборанилкарбоксилатов трис(4-фторфенил)сурьмы присутствуют внутримолекулярные контакты между атомами сурьмы и кислорода карбоксилатных лигандов. Расстояния Sb···O=С составляют 3,349(3), 3,237(3) Å (1); 3,284(6), 3,316(7) Å (2), что меньше суммы вандер-ваальсовых радиусов сурьмы и кислорода (3,70 Å) [25].…”

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Tris(4-Fluorophenyl)Antimony Dicarboranylcarboxylates

Bregadze¹,

Glazun²,

Ефремов³

2019

Chem

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Changing Atomic Structure by Shock Compression

Cited by 2 publications

References 79 publications

Synthesis and Structure Features of Tetraphenylantimony 2,3-Difluoro- and 2,3,4,5,6-Pentafluorobenzoate

Synthesis and Structure Features of Tetraphenylantimony 2,3-Difluoro- and 2,3,4,5,6-Pentafluorobenzoate

Tris(4-Fluorophenyl)Antimony Dicarboranylcarboxylates

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