Mercaptoaryl-Oxazoline Complexes of Palladium and Their High Activities as Catalysts for Suzuki-Miyaura Coupling Reactions in Water

Synthesis and structure of two isomers of a molybdenum(II) 2-butyne complex stabilized by bioinspired S,N-bidentate ligands

Two isomers of the molybdenum(II) com­plex Mo(CO)(C₂Me₂)(S-Phoz)₂ [S-Phoz is 2-(4,4-di­methyl­oxazolin-2-yl)thio­pheno­late] have been synthesized and characterized by X-ray diffraction at 100 K and by spectroscopy (NMR and IR). They show quite different Mo—N and Mo—S distances.

The synthesis and structural determination of two isomers of the molybdenum(II) com­plex (η²-but-2-yne)carbonyl­bis­[2-(4,4-dimethyl-4,5-di­hydro-1,3-oxa­zol-2-yl)benzene­thiol­ato-κ²N,S]molybdenum(II), [Mo(C₁₁H₁₂NOS)₂(C₄H₆)(CO)] or Mo(CO)(C₂Me₂)(S-Phoz)₂, are presented. The N,N-cis–S,S-trans isomer 1 shows quite different bond lengths to the metal atom [Mo—N = 2.4715 (10) versus 2.3404 (11) Å; Mo—S = 2.4673 (3) versus 2.3665 (3) Å]. In the N,N-trans–S,S-cis isomer 2, which is isotypic with the corresponding W com­plex, the Mo—N bond lengths [2.236 (2) and 2.203 (2) Å], as well as the Mo—S bond lengths [2.5254 (8) and 2.5297 (8) Å], are almost the same.