Synthesis and structure of unusual skeletal cylindrical nickel cyclohexasiloxanolates

Shchegolikhina, O.I.; Zhdanov, A.A.; Igonin, V.A.; Ovchinnikov, Y.E.; Shklover, V.E.; Struchkov, Y.T.

Авторы: Shchegolikhina O.I., Zhdanov A.A., Igonin V.A., Ovchinnikov Yu E., Shklover V.E., Struchkov Yu T.
Журнал: ORGANOMETALLIC CHEMISTRY IN THE USSR
Том: 4
Номер: 1
Год издания: 1991
Первая страница: 39
Последняя страница: 44
Аннотация: Two unusual skeletal cylindrical nickel cyclohexasiloxanolates were synthesized as complexes with sodium chloride - Na+[(PhSiO2)]6Ni6(O2SiPh)Cl-]14nBuOH and Na+[(PhSiO2)Ni6(O2SiPh)Cl-]9EtOH.4H2O, whose structures were determined by X-ray diffraction. The isostructural nickel siloxanolate molecules in these complexes have a sandwich structure: two "external" 12-membered cyclohexasiloxanolate ligands are coordinated to six Ni atoms distributed between them in a hexagonal arrangement , each silanolate O atom being linked to two Ni atoms and each Ni atom being coordinated to four silanolate O atoms (two atoms from each cyclic ligand). This Ni, Si, O skeleton has a non-crystallographic symmetry 6/mmm and has the form of a cylinder in the centre of the inner cavity of which the Cl- anion is encapsulated and is coordinated to six Ni atoms arranged in the form of a planar hexagon. The Na+ counterion is outside the nickel siloxanolate molecule and is coordinated to the O atom of the siloxane rings and the solvating molecules. The coordination of the Ni atoms corresponds to a distorted tetragonal bipyramid: with four silanolate O atoms in the equatorial positions, an O atom of the solvating molecules in the proximal apical position, and Cl- ion in the distal apical position.
Добавил в систему: Щеголихина Ольга Ивановна

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Synthesis and structure of unusual skeletal cylindrical nickel cyclohexasiloxanolatesстатья

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