54873-46-0Relevant academic research and scientific papers
Reversible hydrogen adsorption at room temperature using a molybdenum-dihydrogen complex in the solid state
Uchida, Kaiji,Kishimoto, Naoki,Noro, Shin-Ichiro,Iguchi, Hiroaki,Takaishi, Shinya
, p. 12630 - 12634 (2021)
Reversible H2storage under mild conditions is one of the most important targets in the field of materials chemistry. Dihydrogen complexes are attractive materials for this target because they possess moderate adsorption enthalpy as well as adsorption without cleavage of the H-H bond. In spite of these advantages, H2adsorption studies of dihydrogen complexes in the solid state are scarce. We herein present H2adsorption properties of the 16-electron precursor complex ([Mo(PCy3)2(CO)3]) in the solid state synthesized by two procedures. One is the direct synthesis under an Ar atmosphere (1), and the other is removal of the N2-adduct under vacuum (2).2showed ideal Langmuir type reversible ad/desorption of H2above room temperature, whereas1showed irreversible adsorption. The adsorption enthalpy of2was larger than that in THF solution. Using DFT calculation, this difference was explained by the absence of the agostic interaction in the solid state.
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
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 (2007/10/03)
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 (2007/10/03)
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.
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
