Molecular structures of ruthenium half-sandwich complexes with primary and secondary phosphines: [(η6-p-cymene)RuCl2(PR3)] [p-cymene = 1-Me-4-PriC6H4; PR3 = PH2Fc, PH2CH2Fc, PH(CH2Fc)2; Fc = Fe(η5-C5H4)(η5-C5H5)]

Abstract A series of air-stable half-sandwich complexes of general formula [(η 6 - p -cymene)RuCl 2 (PR 3 )] [ p -cymene = 1-Me-4-Pr i C 6 H 4 ; PR 3  = PH 2 Fc ( 1 ), PH(CH 2 Fc) 2 ( 3 ); Fc = Fe(η 5 -C 5 H 4 )(η 5 -C 5 H 5 )] were synthesized from [{( p -cymene)RuCl 2 } 2 ] and the corresponding phosphine and fully characterized by IR and NMR ( 1 H, 13 C, 31 P) spectroscopy. Molecular structures of [(η 6 - p -cymene)RuCl 2 (PR 3 )] [PR 3  = PH 2 Fc ( 1 ), PH 2 CH 2 Fc ( 2 ), PH(CH 2 Fc) 2 ( 3 )] are reported.