201684-74-4Relevant academic research and scientific papers
Preparation and reactivity of mono- and binuclear nitrosyl molybdenum complexes containing S2CPCy3 ligands. Crystal structure of [(OC) 2(ON) Mo(μ-Br) (μ-S2CPCy3) Mo(CO) 2(PEt3) ]
Miguel, Daniel,Riera, Victor,Wang, Mei,Bois, Claudette,Jeannin, Yves
, p. 327 - 336 (1997)
A mononuclear nitrosyl complex with the S2CPCy3 ligand, [MoBr(NO)(CO)2(S2CPCy3] (3), has been prepared from [Mo(CO)3(NCMe)3] in three steps: (i) nitrosylation with an excess of NOBF4, (ii) addition of bromide with Ph4PBr or Et4NBr, and (iii) ligand substitution by S2CPCy3. Complex 3 readily reacts with [M(CO)3(NCR)3] (M = Mo, R = Me; M = W, R = Et) to give binuclear nitrosyl complexes [(OC)2(ON)Mo( μ-Br)( μ-S2CPCy3)M(CO)3] (4a, M = Mo; 4b, M = W) containing η2(S,S′); η3(S,C,S′)-S2CPR3, and bromide bridges. One carbonyl ligand from the 'Mo(CO)3' fragment of the binuclear pentacarbonyl complex 4a can be easily substituted by phosphine or phosphite ligands to give complexes [(OC)2(ON)Mo( μ-Br)( μ-S2CPCy3)Mo(CO)2(L)] (5a: L = PEt3; 5b: L = P(OMe)3). The single crystal X-ray diffraction study of 5a shows that the central carbon atom of the S2CPCy3 ligand is bonded to the molybdenum atom of the 'Mo(CO)2(PEt3)' fragment, which is expected to be electron-richer. With potentially bidentate phosphine ligands (L-L), one CO ligand on the 'Mo(CO)3' fragment of the binuclear complex 4a was replaced and one of the Mo(II)-S bonds was cleaved to afford complexes [(OC)2(ON)Mo( μ-Br)( μ-S2CPCy3)( μ-L-L)Mo(CO)2] (6a: L-L = Me2PCH2PMe2; 6b: L-L = Ph2PCH2Ph2).
