Poly(azolyl) chelate chemistry 14.[1] κ2-S,S′ vs κ3-H,S,S′- H2B(mt)2 (mt=methimazolyl)borate coordination in the complex [W(CO){H2B(mt)2}2]

Soft Scorpionate Hydridotris(2‐mercapto‐1‐methylimidazolyl) borate) Tungsten‐Oxido and ‐Sulfido Complexes as Acetylene Hydratase Models

“…This interaction even persists when the complex is dissolved in the coordinating solvent CD 3 CN. A similar observation was made in the κ 3 ‐ S , S , H complex [W(CO)(Bm Me ) 2 ] in [D 6 ]DMSO . The occurrence of this interaction in both compounds 8 and 9 is confirmed by X‐ray diffraction analysis (Figure ).…”

Chromium, molybdenum and tungsten

“…122 It was also reported that reactions of [M(RCC 6 H 2 Me 3 -2,4,6)X(CO) 2 (L) 2 ] (M ¼ Mo, W; X ¼ Cl, Br; L ¼ pyridine, 3,5-dimethylpyrazole) with Na[H 2 B(mt) 2 ] are metal dependent, providing either the alkylidyne complex [Mo(RCC 6 H 2 Me 3 -2,4, 6)(CO) 2 {k 3 -H,S,Sk-H 2 B(mt) 2 }] or the bis(chelate) complex [W(CO){k 2 -S,Sk-H 2 B(mt) 2 }{k 3 -H,S,Sk-H 2 B(mt) 2 }], the latter featuring both bi and tridentate coordination modes for the H 2 B(mt) 2 ligand. 123 Reaction of the molybdaborane arachno-2- 124 This is a rare example of metal fragment exchange within a metallaborane cage. The molybdenum atom is retained in the molecule via a s-bond between the substituted cyclopentadienyl ring and a basal boron atom in the metallaborane cluster.…”

Boron

“…The molecular structure of latter complex has been determined and shown to feature both biand tri-dentate coordination modes for the H 2 B(mt) 2 ligand. 22 In a related study Na[H 2 B(mt) 2 ] has been shown to react with 1 or 2 equivalents of PtMe 3 I to form the complex [PtMe 3 {H 2 B(mt) 2 }], and sulfur-bridged dinuclear complex [Me 3 Pt {m-H 2 B(mt) 2 }PtMe 3 I], both of which contain 3 centre -2 electron B-HÁ Á ÁPt bonds. 23 The phenyltrihydroborate complexes, Cp 2 ZrCl{(m-H) 2 BHPh} and Cp 2 Zr {(m-H) 2 BHPh} 2 , were prepared from the reactions of Cp 2 ZrCl 2 with one and two moles of LiBH 3 Ph.…”