Intramolecular thioacyl hydroboration: synthesis of [W(η2-S2CR)(CO)2{ η3-HB(pz)2(SCH2R)}] (pz = pyrazol-1-yl, R = C6H4Me-4)

Abstract

The sequential treatment of [W(CR)Br(CO) 4 ] (R = C 6 H 4 Me-4) with sulfur and K[H n B(pz) 4 - n ] (n = 1 or 2; pz = pyrazol-1-yl) provided [W(η 2 -S 2 CR)(CO) 2 {HB(pz) 3 }] or [W(η 2 -S 2 CR)(CO) 2 {η 3 -HB(pz) 2 (SCH 2 R)}], the latter via an unusual reduction of the alkylidyne–tungsten linkage.