Phosphiniden- und arsiniden-komplexe mit pentamethylcyclopentadienyl (Cp★)-liganden am gruppe 15-element: Synthese und Cp★-übertragung

Abstract Reaction of pentamethylcyclopentadienyl-dihalogeno-phosphanes Cp★PHal 2 with the carbonyl metallates Na 2 [M 2 (CO) 10 ] gives the phosphinidene complexes [(CO) 5 M] 2 PCp★ (M = Cr ( 1 ), Mo ( 2 ), and W ( 3 )). Similarly, the arsinidene complexes [(CO) 5 M] 2 AsCp★ (M = Cr ( 4 ) and W ( 5 ) can be synthesized. The deep blue compounds 1 – 5 are air- and moisture-sensitive. Cp★ transfer from phosphorus to chromium is observed in the reaction of 3 with (CH 3 CN) 3 Cr(CO) 3 , which finally gives the complex [(CO) 5 W] 2 PCr(CO) 2 Cp★ ( 6 ) containing a trigonal planar-coordinated η 3 -P unit. The compounds 1 – 6 have been characterized by NMR, IR, MS and UV data.