80822-44-2Relevant academic research and scientific papers
Synthetic Pathways in Binuclear Molybdenum Chemistry: μ-Acetato-, Chloro-, and Tertiary Phosphine Derivatives; X-Ray Structure Determination of trans-n3)(μ-O2CMe)>2>
Green, Malcolm L. H.,Parkin, Gerard,Bashkin, Jim,Fail, John,Prout, Keith
, p. 2519 - 2526 (2007/10/02)
The reaction between 2> and SiMe3Cl in the presence of a variety of donor ligands L n3, or Ph2P(CH2)nPPh2, where n = 1 or 2> yields binuclear compounds such as 2> or .The products may vary according to the stoicheiometry of the reaction.The new compounds described are 2>, 2>, isomers of 2>, trans-n3)(μ-OCOMe)>2>, and .Interconversion of some of these compounds by ligand-replacement reactions is also demonstrated.The crystal structure of trans-n3)(μ-OCOMe)>2> is described; the crystals are monoclinic, space group P21/n1 with a = 14.969(2), b = 15.146(2), c = 8.920(2) Angstroem, β = 105.14(1)deg, and Z = 2.Refinement converged with R = 0.048, R' = 0.063, for 1 762 observed reflections 3?(I)>.The Mo-Mo separation is 2.099(1) Angstroem.The presence of isomers of the various compounds is demonstrated from the hydrogen-1 n.m.r. spectra.
Synthesis and characterization of rectangular tetranuclear cluster complexes of molybdenum(II) by condensation of quadruply bonded dimers
Ryan, Timothy R.,McCarley, Robert E.
, p. 2072 - 2079 (2008/10/08)
Several new synthetic methods have been developed for preparation of the rectangular tetrameric cluster complexes Mo4X8L4 (X = Cl, Br, I; L = neutral donor ligand). Mo4Cl8(CH3OH)4 is prepared efficiently from the dimer Mo2Cl4(PPh3)2(CH3OH) 2 and subsequently converted in good yield to Mo4Cl8(C2H5CN)4 by reaction with propionitrile. Reaction of Mo4Cl8(C2H5CN)4 with triphenylphosphine yields Mo4Cl8(PPh3)4, and with tetrahydrofuran the unstable Mo4Cl8(THF)4 is afforded. The trialkylphosphine derivatives Mo4Cl8(PR3)4 (R = C2H5 or C4H9) may be obtained more conveniently in reactions between (a) K4Mo2Cl8 + PR3 (1:2 mole ratio), (b) Mo2(O2CCH3)4 + PR3 + (CH3)3SiCl (1:2:4 mole ratio), (c) Mo2(O2CCH3)4 + PR3 + AlCl3 (1:2:2 mole ratio), or (d) Mo2Cl4(PR3)4 + Mo(CO)6 (1:1 mole ratio). The Mo4Br8(P-n-Bu3)4 prepared by analogous methods exhibits properties closely related to the chloride derivative; Mo4I8(P-n-Bu3)4 however appears to consist of weakly coupled quadruply bonded dimers. The various compounds have been characterized by UV-visible, infrared, and Cl 2p photoelectron spectra which reflect the basic rectangular cluster structure known for Mo4Cl8(PEt3)4.
