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Title: Synthesis of tin-tellurium polyanions: structure of (Me/sub 4/N)/sub 4/Sn/sub 2/Te/sub 6/

Journal Article · · Inorg. Chem.; (United States)
DOI:https://doi.org/10.1021/ic00183a020· OSTI ID:6766326

The reaction of KSn with Te at high temperature gives congruently melting K/sub 4/SnTe/sub 4/ (1) and Sn. Aqueous extraction and workup of the crude K/sub 4/SnTe/sub 4/ alloy give nearly quantitative yields of K/sub 4/SnTe/sub 4/ identified by /sup 119/Sn and /sup 125/Te NMR, /sup 119/Sn Moessbauer, and Raman measurements. Depending on the cation and solvent used, a variety of products can be isolated from solutions of SnTe/sub 4//sup 4 -/ including Te/sub 4//sup 2 -/ and Sn/sub 2/Te/sup 4 -//sub 6/. The compound (methyl)(Me/sub 4/N)/sub 4/Sn/sub 2/Te/sub 6/, which was structurally characterized, is isostructural with B/sub 2/H/sub 6/ and exhibits effective D/sub 2h/ symmetry. The ditinhexatelluride (4-) anion crystallized in the monoclinic space group P2/sub 1//c with lattice constants at -168/sup 0/C of a = 11.229 (5) A, b = 13.590 (6) A, c = 12.67 (7) A, and ..beta.. = 116.96 (2)/sup 0/ with Z = 2. The x-ray data were refined to residuals of R = 0.0296 and R/sub w/ = 0.0312, giving terminal Sn-Te distances of 2.700 (2) and 2.689 (1) A and bridging Sn-Te distances of 2.794 (1) and 2.804 (1) A. 32 references, 5 figures, 3 tables.

Research Organization:
Indiana Univ., Bloomington
DOE Contract Number:
W-31-109-ENG-38
OSTI ID:
6766326
Journal Information:
Inorg. Chem.; (United States), Vol. 23:15
Country of Publication:
United States
Language:
English