158849-89-9Relevant academic research and scientific papers
C/s-Tetracarbonylbis(tricyclohexyl-phosphine)moIybdenum(O) and pentacarbonyl(tricyclohexylphos-phine)molybdenum(O)
Cortes-Figueroa, Jose E.,Leon-Velazquez, Madeline S.,Ramos, Johanna,Jasinski, Jerry P.,Keene, David A.,Zubkowski, Jeffrey D.,Valente, Edward J.
, p. 1435 - 1437 (2000)
In the present redetermination of the complex m-tetracarbonylbis(tricyclohexylphosphine)molybdenum(0) (I) [Mo(C18H33P)2(CO)4] or m-{?1-[P(C6H1,)3]2}Mo(CO)4 the Mo atom has a distorted octahedral geometry with a large P-Mo-P angle of 104.8 (1)°. A strong trans influence on the carbonyls in (I) is seen in a shortening of the Mo-C and a lengthening of the C-O distances opposite the phosphines compared with those that are cis. This influence is greatly diminished in the complex pentacarbonyl(tricyclohexyl-phosphine)molybdenum(O) (II) [Mo(C18H33P)(CO)5] or (η1-[P(C6Hn)3])Mo(CO)5 the core of which has a slightly distorted C4v geometry.
trans-tetracarbonylbis(tricyclohexyl-phosphine)molybdenum(0), trans-[Mo(CO)4(PCy3)2]
Alyea, Elmer C.,Ferguson, George,Kannan, Shanmugaperumal
, p. 765 - 767 (1996)
The title compound, [Mo(CO)4{P(C6H11)3}2], has crystallographic inversion symmetry and principal dimensions Mo-P 2.5436(9), Mo-C 2.020(4) and 2.028 (3) A. The mean cone angle for the cyclohexylphosphine ligand is 155°, compared with 146° for the cis isomer.
Pentabenzylcyclopentadienyl molybdenum and tungsten hydrides: Syntheses, structures and electrochemistry of [MHCpBz(CO)2(L)] (L = CO, PMe3, PPh3)
Augusta Antunes,Namorado, Sónia,de Azevedo, Cristina G.,Amélia Lemos,Teresa Duarte,Ascenso, José R.,Martins, Ana M.
, p. 1328 - 1336 (2010/05/19)
Complexes [MHCpBz(CO)2(PR3)] (R = CH3, M = Mo (1); M = W (2); R = Ph, M = Mo (3); CpBz = C5(CH2Ph)5) were prepared by thermal decarbonylation of the corresponding [MHC
Oxygen atom transfer reaction to metal carbonyls. Kinetics and mechanism of CO-substitution reactions of Mo(CO)5L in the presence of (CH3)3NO
Gao, Yi-Ci,Shi, Qi-Zhen,Kershner, David L.,Basolo, Fred
, p. 188 - 191 (2008/10/08)
Kinetic data are reported for the reactions of Mo(CO)5L (where L1 = P(c-Hx)3, P(n-Bu)3, NMe3, py, PPh3, AsPh3, P(OEt)3, or P(OMe)3) with L in the presence of Me3NO to form cis-Mo(CO)4L2. The rates of reactions are second order: first order in Mo(CO)5L concentration, first order in Me3NO concentration, and zero order in L concentration. For ligand L with cone angles less than 135°, the rates of reaction increase with increasing stretching frequency of the CO bands in the IR. This supports the proposed mechanism, which involves attack by the O atom of Me3NO on a C of a CO cis to L in Mo(CO)5L For L = PPh3 or AsPh3, the reactions are faster than expected on the basis of their νCO values, and this is discussed in terms of steric effects.
Molibdenum-95 nuclear magnetic resonance studies on disubstituted molibdenum(0) carbonyls
Alyea, Elmer C.,Somogyvari, Arpad
, p. 397 - 400 (2007/10/02)
Molibdenum-95 nmr spectral data are reported for 40 cis- and trans-Mo(CO)4LL' compounds and the chemical shifts discussed in relation to a simplified Ramsey expression for the paramagnetic shielding term.The identification of mixtures of products of the type Mo(CO)6-nLn is shown to be easily accomplished by 95Mo nmr spectroscopy.The 95Mo chemical shifts provide a sensitive probe of structural and electronic effects, as illustrated for several cyclic nitrogen ligands as well as a range of phosphine ligands in the Mo(CO)4LL' complexes.
Five-co-ordinate Molybdenum and Tungsten Complexes, , which Reversibly add Dinitrogen, Dihydrogen, and Other Small Molecules
Kubas, Gregory J.
, p. 61 - 62 (2007/10/02)
New complexes of molybdenum and tungsten with dinitrogen and other small molecules, trans- (L = N2, H2, C2H4, or SO2), have been synthesized by the reaction of with 2PCy3 in the presence of L; removal of L yield
