206365-31-3Relevant academic research and scientific papers
Comparison of the neutral benzyldiphenylphosphine complexes C6H6Cr(CO)2PPh2Bz and C5H5Mn(CO)2PPh2Bz with the isoelectronic manganiobenzyldiphenylphosphonium salts [C5R5Mn(CO) (NO)PPh2Bz]BF4
Geicke,Lorenz,Polborn
, p. 101 - 108 (2008/10/08)
The photolytically or thermally induced substitution reactions of C6H6Cr(CO)3, C5H5Mn(CO)3 or [C5R5Mn(CO)2(NO)]BF4 (R = H, CH3) with PPh2Bz led to isoelectronic benzyldiphenylphosphine complexes of half sandwich type C6H6Cr(CO)2PPh2Bz (1), C5H5Mn(CO)2PPh2Bz (2), [C5H5Mn(CO)(NO)(PPh2Bz)]BF4 (3a) and [C5Me5Mn(CO)(NO)(PPh2Bz)] BF4 (3b). In contrast to the neutral compounds 1 and 2, the phosphonium salts 3a, 3b can be deprotonated at the α-methylene group by bases such as DBU and LDA to give the neutral manganiodiphenylalkylidenephosphoranes C5R5Mn(CO)(NO)(PPh2=CHPh) (4a, 4b). 1H-. 13C-, 31P{ 1H)-NMR, IR and mass spectra of 1-4 are given. Crystals of 1 are orthorhombic, space group Pbca, with a = 19.960(3), b = 16.599(3) and c = 14.573(3) A?, Z = 8 and R = 0.0521 for 2433 observed reflections. Crystals of 2 and 3a are monoclinic, space group P21/c, with a = 9.730(3), b = 23.123(6) and c = 9.784(3) A?, Z = 4 and R = 0.0430 for 2512 observed reflections for 2, and a = 12.457(3), b = 10.597(3) and c = 18.764(5) A?, Z = 4 and R = 0.0477 for 2765 observed reflections for 3a.
