Issue 4, 2023

Phosphido-borane-supported stannates

Abstract

The reactions between SnCl2 and three equivalents of the alkali metal phosphido-borane complexes [R2P(BH3)]M yield the corresponding tris(phosphido-borane)stannate complexes [LnM{R2P(BH3)}3Sn] [R2 = iPr2, LnM = (THF)3Li (2Li), (Et2O)Na (2Na), (Et2O)K (2K); R2 = Ph2, LnM = (THF)Li (3Li), (THF)(Et2O)Na (3Na), (THF)(Et2O)K (3K); R2 = iPrPh, LnM = (THF)4Li (4Li)]. In each case X-ray crystallography reveals an anion consisting of a trigonal pyramidal tin centre coordinated by the P atoms of the phosphido-borane ligands. These tris(phosphido-borane)stannate anions coordinate to the alkali metal cations via their BH3 hydrogen atoms in a variety of modes to give monomers, dimers, and polymers, depending on the alkali metal and the substituents at the phosphorus centres. In contrast, reactions between SnCl2 and three equivalents of [tBu2P(BH3)]M (M = Li, Na) gave the known hydride [M{tBu2P(BH3)}2SnH], according to multinuclear NMR spectroscopy.

Graphical abstract: Phosphido-borane-supported stannates

Supplementary files

Article information

Article type
Paper
Submitted
07 Nov 2022
Accepted
21 Dec 2022
First published
24 Dec 2022
This article is Open Access
Creative Commons BY license

Dalton Trans., 2023,52, 947-954

Phosphido-borane-supported stannates

K. Izod, A. M. Madlool, A. Craig and P. G. Waddell, Dalton Trans., 2023, 52, 947 DOI: 10.1039/D2DT03587A

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