Abstract
AbstractThe SO2 coordination mode at the rhodium complex [ClRh(P∼O)()] (1) [ η2(O,P)‐chelated Cy2PCH2CH2OCH3 ligand; P∼O 1(P)‐coordinated] is controlled by the hemilabile ligand Cy2PCH2CH2OCH3 and shows a dependence on the polarity of the solvent. In polar organic solvents (e.g. acetone) the addition of sulfur dioxide results in the formation of a trigonal‐pyramidal oriented SO2 group in [ClRh(η1‐SO2)(P∼O)()] (2a). However, in nonpolar media (e.g. n‐hexane) a trigonal‐coplanar geometry of the SO2 unit in [ClRh(η1‐SO2)(P∼O)2] (2b) is favored.
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