Optically active transition-metal compounds. 80. Synthesis, stereochemistry, and X-ray analysis of allylcarbonylnitrosyl(aminophosphine)iron complexes

Article abstract of DOI:10.1021/om00079a029

The complexes (η³-RC₃H₄)Fe(CO)(NO)(C₆H ₅)₂PN(R′)CH(CH₃)(C₆H ₅) (R, R′ = H, CH₃), 1-4, were synthesized by reaction of (η³-RC₃H₄)Fe(CO)₂NO with the corresponding (S)-ammophosphine. Two diastereoisomers, b (AS) and a (SS), differing only in the Fe configuration, were formed that could be separated by fractional crystallization and preparative liquid chromatography. The compounds are configurationally stable at the Fe atom up to 120°C. The absolute configurations of diastereomers 1a and 2b have been determined by X-ray analysis. The conformations of a series of aminophosphine complexes are compared.