Study of structure of bis(triphenylstannyl) chromate(VI) by infrared, Mössbauer, and 1H, 13C and 119Sn NMR spectra

1 January 1984

journal article
Published by Institute of Organic Chemistry & Biochemistry in Collection of Czechoslovak Chemical Communications

Vol. 49 (6) , 1497-1504
https://doi.org/10.1135/cccc19841497

Abstract

The infrared, Mössbauer, and ¹H, ¹³C and ¹¹⁹ Sn NMR spectra have been used to study the structure of bis(triphenylstannyl) chromate(VI) in solid state and in solvents of both noncoordinating and coordinating types. In solid state the compound forms a three-dimensional polymer: the tetrahedral CrO₄ group and trans-trigonally bipyramidal (C₆H₅)₃SnO₂ grouping are connected mutually symmetrically by bridges represented by the common oxygen atoms. The three phenyl groups in the (C₆H₅)₃SnO₂ grouping are located in the equatorial plane of the trigonal bipyramide which is completed by two bridge oxygen atoms in axial positions. Solutions in noncoordinating solvents contain monomeric bis(triphenylstannyl) chromate(VI). The ester molecule contain two tetrahedral, (C₆H₅)₃SnO groups bound by oxygen bridges to a CrO₄ group which shows the C_2v symmetry. In coordinating solvents the title compound forms a molecular complex having the coordination number 5 at the central tin atom.

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