Spelling suggestions: "subject:"metal carbonyls"" "subject:"fetal carbonyls""
21 |
Preparation of Endohedral Metallofullerenes by using Metal Carbides and Metal CarbonylsYang, Chun-Wen 14 August 2010 (has links)
none
|
22 |
Spectroscopic, kinetic and synthetic studies on some of the first row transition metal halocarbonyls and their derivatives.Spendjian, Hagop Krikor. January 1970 (has links)
No description available.
|
23 |
Infrared intensities of the CO stretching modes of some transition metal carbonyl complexesJohansson, Dawn Agnes January 1974 (has links)
No description available.
|
24 |
Synthetic and structural studies of the coordinative versatility of pnicogen atoms in metal carbonyl compoundsFoust, Alan S., January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
|
25 |
Infrared intensities of the CO stretching modes of some transition metal carbonyl complexesJohansson, Dawn Agnes January 1974 (has links)
No description available.
|
26 |
Spectroscopic, kinetic and synthetic studies on some of the first row transition metal halocarbonyls and their derivatives.Spendjian, Hagop Krikor. January 1970 (has links)
No description available.
|
27 |
The chemistry of ruthenium carbonyl clusters containing nitrene and nitrido ligands何毅雯, Ho, Ngai-man, Emmie. January 2000 (has links)
published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy
|
28 |
The chemistry of ruthenium carbonyl clusters containing nitrene and nitrido ligands /Ho, Ngai-man, Emmie. January 2000 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2000. / Includes bibliographical references.
|
29 |
Rhenium(I) tricarbonyl complexes synthesis, photophysics, swithing and recognition properties /Odongo, Onduru Stephen. January 2005 (has links)
Thesis (Ph. D.)--State University of New York at Binghamton, Chemistry Department, 2005. / Includes bibliographical references.
|
30 |
Dynamics of the Solvent Exchange Reaction of Weakly Bound Organic Solvents to Group 6 Transition Metal Carbonyls and the Molybdenum Hexacarbonyl Mediated Pauson-Khand ReactionGates, Richard J. 06 February 2012 (has links) (PDF)
Many organometallic reactions are solvent-dependent, suggesting solvent molecules interact with reaction intermediates. Studies of the solvent exchange reaction of group 6 transition metal carbonyls with moderately binding ligands have provided insight into these interactions, however, studies of the mechanism for this reaction with weakly binding ligands have not been performed. Experiments were conducted on the nanosecond time scale in methylcyclohexane over the temperature range of 4 to 44 °C using Step Scan FTIR (SS FTIR) spectroscopy with weakly binding ligands benzene and mesitylene. Upon photolysis of the metal hexacarbonyls, the kinetically favored product (M(CO)5(solv)), decays following pseudo-first-order kinetics to the thermodynamical favored product, M(CO)5(L). The decay is fit using a single exponential decay with a single exponential instrument response function, time zero and an offset. An Arrhenius plot yielded activation energies of 23.7 kJ/mol (M = Mo, L = benzene), 35.1 kJ/mol (M = W, L = benzene) and 29.8 kJ/mol (M = Mo, L = mesitylene). DFT calculations using NWCHEM gave binding energies of 45.8 and 54.3 kJ mol-1 for Mo(CO)5C6H12 and W(CO)5C6H12. The experimental and computational results suggest the exchange mechanism proceeds through an associative pathway, were slightly negative values of the entropy of reaction denote that the transition state has greater metal solvent bond breaking character then the more moderately binding ligands in the literature. Density Functional theory was used to calculate C-O vibrational frequencies of metal carbonyl complexes measured in our work and other complexes from the literature, with density functionals B3LYP, M06 and M06-L. Measured and computational frequencies were compared to obtain both an overall vibrational shift and a scaling factor. Scaling factors were found to be 0.9519±0.0095 for B3LYP, 0.9429 ± 0.0087 for M06 and 0.9565 ± 0.0095 for M06-L with overall shifts of 102 ± 16, 121 ± 15, 93 ± 17 cm-1, respectively. The molybdenum mediated Pauson-Khand reaction, a [2+2+1] cyclo-addition begins very similarly to the solvent exchange reaction on molybdenum. The initial product, the solvated complex, decays away with pseudo-first-order kinetics as the solvent is replaced by the C-C triple bond in 2-(2-propen-1-yl)-2-(2-propyn-1-yl)-,1,3-diethyl ester. An Arrhenius plot over the temperature range of -8 to 20° C yielded an energy of activation of 15.6 kJ/mol.
|
Page generated in 0.0473 seconds