38433-41-9Relevant academic research and scientific papers
Synthesis, spectroscopic and structural characterisation of chromium(0), molybdenum(0) and tungsten(0) complexes involving primary and secondary phosphines
Campbell, Tom,Gibson, Alexander M.,Hart, Richard,Orchard, Simon D.,Pope, Simon J.A.,Reid, Gillian
, p. 296 - 305 (2007/10/03)
[M(CO)6] (M=Mo or W) reacts with 4.5 molar equivalents of L (L=PPh2H or PPhH2) in excess ethanolic NaBH4 to yield the fac-trisubstituted species [M(CO)3(L)3] in good yield, with no evidence
Bimetallic Systems. Part 9. The Synthesis of and Nuclear Magnetic Resonance Studies on 10-Membered Ring Complexes of Type 1(μ-Ph2PCH2CH2PPh2)2M2(CO)4> (M1, M2 = Cr, Mo, or W)
Iggo, Jonathan A.,Shaw, Bernard L.
, p. 1009 - 1014 (2007/10/02)
The Ph2PCH2CH2PPh2(dppe) bridged, bimetallic 10-membered ring complexes 1(μ-dppe)2M2(CO)4> have been synthesised by treating a complex of type cis-1(CO)4(PPh2H)2> with one of type cis-2(CO)4(PPh2(CH=CH2))2> in the presence of potassium t-butoxide as catalyst.The new precursor complexes cis- were prepared by displacement of norbornadiene (nbd) from .The fluxional processes in the 10-membered M1(μ-dppe)2M2 rings have been studied by variable-temperature 31P-(1H) n.m.r. spectroscopy and are characterised by a change from a second-order AA'XX' system at 20 deg C to an essentially first-order AMPX system at -90 deg C.The spectra have been fully interpreted and values for 2J(cis-PMP) obtained.The 31P-(1H) n.m.r. spectra of the homonuclear M(μ-dppe)2M systems change from A4 at 20 deg C to AA'BB' at -90 deg C.The low-temperature (-100 deg C) 1H and 1H-(31P) spectra were not resolved.These binuclear complexes are remarkably inert towards disproportionation to mononuclear chelate species and to attack by HCl or halogens.
