Synthesis and Characterization of Dimolybdenum(II) Thiocyanate Complexes, Dimolybdenum(II) Halide Complexes Containing Rigid Arsine and Phosphine Ligands and Isolation of Crystals of Mo2Cl4 (P(Ome)3)4
Fiore, Elizabeth A.
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The reactions of (NH4)5 [Mo2 Cl8] Cl*H20 with the thiocyanate ligand and tri-n-propylphoshine (PPrnc ) bis (1,3-diphenylphosphino) propane (dppp) and l-diphenyl-phosphino-2-diphenylarsinoethane (arphos), with the rigid phosphine and arsine ligands bis(1,2-diphenylphosphino) benzene (dppben) and Q-phenylenebis (dimethylarsine) (diars) and with trimethylphosphite (P(OMe)3) in refluxing alcoholic solvents are described. Through spectroscopic analysis of the thiocyanate complexes, the ligands were observed to be in a trans disposition. M02 (NCS)4 (pprn 3 )4' Mo2(NCS)4 (dppp)2 and Mo2 (NCS)4 (arphos)2 were found to isostructural to their halide analogues, the latter two having the organic ligands bridging the Mo-Mo bonds. Through comparison of the spectroscopic data of Mo2 Cl4(diars)2, Mo2Br4 (diars)2, Mo2 Cl4 (dppben)2 and M02Br4(dppben)2' they were found to be isostructural to the known compound Mo2 Cl4(diars)2, possessing chelating organic ligands. Methods for the isolation of the crystals of Mo2 C14 (P(OMe)3)4 were determined. These crystals will be used for an x-ray crystallographic structure determination.
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Synthesis and Characterization of Multiply Bonded Dimolybdenum(II) Halide Complexes Containing 1,2-Bis(Diphenylphosphino)Benzene and Dimolybdenum(II) Thiocyanate Complexes Lynch, Will E. (Kalamazoo College, 1986)The reactions of (NH4)5 Mo2Cl9*H20 and (NH4)4Mo2Br8 with the phosphine ligand dppben in different refluxing alcoholic solvents are described. Through spectroscopic comparison with the known compound Mo2Cl 4 (diars)2, ...
Dimolybdenum(II) Bromide Complexes Containing Bidentate Tertiary Phosphine and Arsine Ligands: Kinetic vs. Thermodynamic Reaction Control and Structural Characterization of a Mononuclear Complex Resulting from M-M Bond Cleavage Derringer, Daniel R. (Kalamazoo College, 1984)The reactions of (NH4)4Mo2Br8 with bidentate tertiary phosphine and arsine donors Ph2P(CH2)PPh2 (dppm), Ph2P(CH2)2PPh2 (dppe), Ph2P(CH2)2AsPh2 (arphos), Ph2P(CH2)3PPh2 (dppp) in refluxing alcoholic solvents MeOH, EtOH ...
The Synthesis and Characterization of Dimolybdenum(II) and Rhenium(III) Complexes Containing Quadruple Metal-Work Bonds and Bidentate Tertiary Phosphines and Arsines Root, Dawn R. (Kalamazoo College, 1983)This study deals with compounds of metal-metal quadruple bonds. The quadruple bond consists of four components--a σ component, two π components, and a δ component. When the metal-metal bond is taken as the z-axis, these ...