Cyclopentadienylides as ligands in manganese complexes

Coordination complexes of aryl- and alkylphosphonium cyclopentadienylides (cyclopentadienylidene ylides), C5R4PR′R′′R′′′ (R=H, alkyl, aryl; R′, R′′, R′′′=alkyl, aryl)

“…In 1976, Nesmeyanov et al [16] reported the synthesis of a cationic manganese tricarbonyl complex of C 5 H 4 PPh 3 . When C 5 H 4 PPh 3 was stirred for 1 day at room temperature with [Mn(CO) 3 6 ] was synthesized as shown in Fig.…”

“…When C 5 H 4 PPh 3 was stirred for 1 day at room temperature with [Mn(CO) 3 6 ] was synthesized as shown in Fig. 33 [16]. This compound is isoelectronic with the group 6 compound ( 5 -C 5 H 4 PPh 3 )Cr(CO) 3 , is stable in air as a solid and is soluble in polar solvents such as acetone, THF, methanol and ethanol.…”

“…In addition, while the spectroscopic data clearly indicate successful syntheses of the desired compounds, no structural information was presented. Both compounds were reported as being highly crystalline [16,17] and X-ray structures of these compounds should be possible and would add to the understanding of their bonding.…”