Reactions of [Mo{HB(3,5-Me 2pz) 3}(NO)Cl 2l with [Ph 3Sn] 2S and of [Et 3NH][Mo{HB(3,5-Me 2pz) 3}(NO)Cl 2] with elemental sulphur. The molecular structure of μ-disulphido bis(chloro)nitrosyl-{hydrotris(3-5-dimethylpyrazol-1-yl)-borato-molybdenum}, [Mo{HB(3,5-Me 2pz) 3}(NO)Cl] 2(μ-S 2)

Abstract

[Mo(NO)L *Cl 2] [L * = hydrotris(3,5-dimethylpyrazol-l-yl)borate] reacted with S(SnPh 3) 2 to give {[Mo(NO)L *Cl} 2(μ-S 2)] in low yield. The reaction between [Et 3NH] [Mo(NO)L *Cl 2] and elemental sulphur afforded [{Mo(NO)L *} 2(μ-S) 2] and [{Mo(NO)L *Cl} 2(μ-S 2)]. Both compounds undergo reversible one-electron reductions. The molecular structure of one isomer of [{Mo(NO)L *Cl} 2(μ-S 2)] was determined crystallographically and the compound contains an MoSSMo core with short MoS distances of 2.310 Å, but no direct metal-metal bond.