Sulfur dioxide ligand group 6 complexes

An X-ray structure determination Cmcm i i= 0.061 of pale yellow crystals of compound B obtained from the sulfur dioxide reaction, shows a neutral complex of symmetry mm2 to be present in the solid. The anionic part of the molecule consists of two anellated l,2-dihydro-5-oxo-l,2,4-triphosphol-3-olate rings which share the central P-P group (P-P 215.3 P-C 189.1 P-C 178.4 C-O 123.9pm C-P-P 98.4° C-P-C 91.2° C P C 98.7°). The lithium cations are coordinated square pyramidally (Li-0 193.5 to 209.1 pm), each binding a 1,2-dimethoxyethane and a tetrahydrofiiran ligand in addition [30]. 

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