Substituted carbonyl derivatives of the Group VI transition metals. II. Complexes with tritolylphosphines

1971 ◽  
Vol 24 (12) ◽  
pp. 2471 ◽  
Author(s):  
JA Bowden ◽  
R Colton
Keyword(s):  
Steric Effects ◽  
Molar Ratio ◽  
Mass Spectral Data ◽  
Group Vi ◽  
Mass Spectral ◽  
Carbonyl Derivatives ◽  
Nuclear Magnetic Resonance Spectra ◽  
Metal Hexacarbonyls ◽  
Cis And Trans ◽  
Derivatives Of

The reactions of the three tritolylphosphines (ortho, meta, and para) with the metal hexacarbonyls, M(CO)6 (M = Cr, Mo, W), have been investigated under a variety of conditions of temperature, ultraviolet irradiation, and molar ratio. The products were of the general formulae M(CO)5L and cis and trans M(CO)4L2 [L = tri-tolylphosphine] although not all the tetracarbonyl complexes could be prepared. Infrared and nuclear magnetic resonance spectra of these compounds showed interesting trends as the ligand was varied. ��� In addition, a novel series of derivatives with tri(o- tolyl)phosphine (pot) has been isolated, which on the basis of infrared, N.M.R., and mass spectral data are formulated as π- (pot)M(CO)3. ��� The nature of the above reactions and the properties of the products are explained in terms of an argument based on steric effects.

Substituted carbonyl derivatives of the Group VI transition metals. III. Complexes with π-bonded bridging triarylphosphines

1973 ◽  
Vol 26 (1) ◽  
pp. 43 ◽  
Author(s):  
JA Bowden ◽  
R Colton
Keyword(s):  
High Temperature ◽  
Pure State ◽  
The Other ◽  
Spectral Measurements ◽  
Group Vi ◽  
Mass Spectral ◽  
Chromium Hexacarbonyl ◽  
Carbonyl Derivatives ◽  
Molecular Arrangement ◽  
Derivatives Of

The reactions of chromium hexacarbonyl with triphenylphosphine, tri(m- tolyl)- phosphine (pmt), and tri(p-tolyl)phosphine (ppt) at high temperature yield two series of complexes Cr(CO)3L and [Cr(CO)2L]2, although only the latter could be isolated in a pure state. These dimeric derivatives were characterized by analysis, infrared, N.M.R., and mass spectral measurements. All the data are consistent with a molecular arrangement incorporating π-bonding between chromium and one of the arene rings of the ligand which is also σ-bonded through phosphorus to the other metal atom, thus forming a novel, highly unsymmetrical bridge system.

Substituted carbonyl derivatives of the Group VI transition metals. IV. Reactions of some arene-metal tricarbonyls with Triaryl-phosphine and -arsine ligands

1973 ◽  
Vol 26 (3) ◽  
pp. 655 ◽  
Author(s):  
JA Bowden ◽  
R Colton ◽  
CJ Commons
Keyword(s):  
Carbon Monoxide ◽  
Solid State ◽  
Transition Metals ◽  
Steric Effects ◽  
Group Vi ◽  
Decomposition Products ◽  
Carbonyl Derivatives ◽  
Derivatives Of

The reactions of triphenylphosphine and triphenylarsine with (π- arene)M(CO)3 (M = Cr, Mo, W) to yield fac-M(CO)3(RPh3)3 (R = P, As) have been reexamined. Anomalies in the earlier literature have been resolved by the isolation of two solid state forms of each complex and by a study of the decomposition products of these compounds. Tricarbonyl complexes of tritolyl-phosphines and -arsines are also reported and their behaviour suggests steric effects initiate decomposition. In addition, a number of (π-arene)M(CO)3 compounds were shown to react with carbon monoxide to form M(CO)6.

Substituted carbonyl derivatives of the Group VI transition metals. V. Complexes with tolyl-substituted Bis(diphenylarsino)methane ligands

1974 ◽  
Vol 27 (2) ◽  
pp. 401 ◽  
Author(s):  
JA Bowden ◽  
R Colton ◽  
Z Sztajer
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Infrared Spectroscopy ◽  
Magnetic Resonance ◽  
Transition Metals ◽  
Steric Effects ◽  
Group Vi ◽  
Carbonyl Derivatives ◽  
Derivatives Of ◽  
Nuclear Magnetic

Ligands of the type bis(ditoly1arsino)methane have been synthesized and their derivatives with hexacarbonylmolybdenum(0) prepared. Nuclear magnetic resonance and infrared spectroscopy have been used to determine the stereochemistry of the complexes and also to study steric effects within the molecules.

ChemInform Abstract: NITROSYL CARBONYL DERIVATIVES OF GROUP VI METALS

1977 ◽  
Vol 8 (4) ◽  
pp. no-no
Author(s):  
S. C. TRIPATHI ◽  
S. C. SRIVASTAVA ◽  
A. K. SHRIMAL
Keyword(s):  
Group Vi ◽  
Carbonyl Derivatives ◽  
Derivatives Of

scholarly journals The Effect of Some 3-Oxygen Functions on the Simmons–Smith Methylenation of 5,6-Unsaturated Steroids

1971 ◽  
Vol 49 (22) ◽  
pp. 3636-3641 ◽  
Author(s):  
J. F. Templeton ◽  
C. W. Wie
Keyword(s):  
Double Bond ◽  
Spectral Data ◽  
Ethyl Ether ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Derivatives Of ◽  
Ethylene Acetal

The effect of 3α- and 3β-hydroxy, 3α- and 3β-acetoxy, 3-ethylene acetal, and 3α-methoxy derivatives of 5-cholestene on the addition of the Simmons–Smith reagent to the steroidal 5,6-double bond has been investigated. Reaction occurred only with epi-cholesterol to yield chiefly 3α-hydroxy-5,6α-cyclopropano-5α-cholestane. The 3α-ethyl ether, 3α-acetate, and a dialkoxymethane have been identified as byproducts. The p.m.r. and mass spectral data are given.

scholarly journals Acoustical Studies of Some Derivatives of 1,5-Benzodiazepines at 298.15 K

2014 ◽  
Vol 38 ◽  
pp. 132-142 ◽  
Author(s):  
Shipra Baluja ◽  
Nilesh Godvani
Keyword(s):  
Free Path Length ◽  
Isentropic Compressibility ◽  
Dimethyl Formamide ◽  
Solvation Number ◽  
Mass Spectral Data ◽  
Acoustical Parameters ◽  
Relaxation Strength ◽  
Mass Spectral ◽  
Derivatives Of ◽  
Structural Characterizations

Some new derivatives of 1,5-Benzodiazepines have been synthesized and their structural characterizations are done by IR, NMR and Mass Spectral data. The ultrasonic velocity, density and viscosity of these synthesized compounds have been measured in dimethyl formamide and tetrahydrofuran at 298.15 K. From these experimental data, some acoustical parameters such as isentropic compressibility, intermolecular free path length, Rao’s molar sound function, relaxation strength, solvation number etc., have been calculated which helps in understanding the molecular interactions occurring in these solutions.

Infrared Spectra and Structures of Metal Carbonyl Derivatives. III. Acetylene and Olefin Derivatives of Group VI Metal Carbonyls

1963 ◽  
Vol 2 (6) ◽  
pp. 1264-1267 ◽  
Author(s):  
Ingo W. Stolz ◽  
Gerard R. Dobson ◽  
Raymond K. Sheline
Keyword(s):  
Infrared Spectra ◽  
Metal Carbonyl ◽  
Metal Carbonyls ◽  
Group Vi ◽  
Carbonyl Derivatives ◽  
Derivatives Of
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