Different bonding modes of sulfur bis-ylides in Pd complexes: Crystal structure of [Pd(μ-OAc){μ-[CH(SMe2)]2C(O)}(acac-O,O′)2]ClO4

✍ Scribed by E. Serrano; T. Soler; R. Navarro; Esteban P. Urriolabeitia

• Book ID: 103838292
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 274 KB
• Volume: 890
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2008.03.033

✦ Synopsis

The reaction of [Me 2 SCH 2 C(O)CH 2 SMe 2 ]Br 2 (1) with Pd(OAc) 2 gives the mononuclear neutral complex cis- 2) through double deprotonation of the bis-sulfonium salt. The sulfur bisylide coordinates in (2) as a C,C 0 -chelating ligand, and is obtained as a single diastereoisomer (meso form, RS/SR), in spite of the presence of two stereogenic ylidic centers. Reaction of ( 2) with AgClO 4 and Tlacac gives [Pd(acac-O,O 0 ){g 2 -[CH(SMe 2 )] 2 C(O)}]ClO 4 (3), which shows the same bonding mode for the bisylide ligand. However, (2) reacts with Pd(OAc) 2 , AgClO 4 and Tlacac to give the dinuclear [Pd 4) as two different isomers. In complex (4) the bis-ylide bridges two palladium atoms and the presence of two isomers arise from the relative arrangement of the bisylide with respect to the acetate ligand. The X-ray crystal structure of (4) has been determined.