ChemInform Abstract: ISOTOPIC STUDIES OF THE METAL-LIGAND BOND PART 4, VARIABLE TEMPERATURE AND ISOTOPIC STUDIES OF THE METAL-LIGAND VIBRATIONS IN SUBSTITUTED PYRIDINE METAL DIHALIDES, COMPLEXES OF COBALT(II), NICKEL(II) AND COPPER(II)

1973 ◽  
Vol 4 (33) ◽  
pp. no-no
Author(s):  
A. B. P. LEVER ◽  
BARATHAM S. RAMASWAMY
Keyword(s):  
Variable Temperature ◽  
Isotopic Studies ◽  
Metal Ligand ◽  
Ligand Bond

Isotopic Studies of the Metal–Ligand Bond. Part IV. Variable Temperature and Isotopic Studies of the Metal–Ligand Vibrations in Substituted Pyridine Metal Dihalides. Complexes of Cobalt(II), Nickel(II), and Copper(II)

1973 ◽  
Vol 51 (10) ◽  
pp. 1582-1586 ◽  
Author(s):  
A. B. P. Lever ◽  
Baratham S. Ramaswamy
Keyword(s):  
Low Temperature ◽  
Variable Temperature ◽  
Far Infrared ◽  
Isotopic Substitution ◽  
Isotopic Studies ◽  
Band Assignment ◽  
Derivatives Of ◽  
Far Infrared Spectra ◽  
Metal Ligand ◽  
Ligand Bond

The far infrared spectra (500–200 cm−1) of a series of picoline and ethylpyridine derivatives of cobalt(II), nickel(II), and copper(II) are reported. Metal–ligand assignments are based on isotopic substitution experiments with 65Cu and 62Ni. Low temperature data are also reported and it is noted that the energies of metal–ligand modes are much more sensitive to temperature than the energies of purely ligand vibrations. This observation is discussed and it is suggested, with some caution, that the low temperature behavior may be used as a guide to band assignment.

Isotopic Studies of the Metal–Ligand Bond. Part II. The Far Infrared Spectra of Some Binuclear and Polymeric Copper Carboxylate Derivatives; Variable Temperature and Isotopic Studies of the Copper–Ligand Vibrations

1973 ◽  
Vol 51 (4) ◽  
pp. 514-519 ◽  
Author(s):  
A. B. P. Lever ◽  
B. S. Ramaswamy
Keyword(s):  
Infrared Spectra ◽  
Variable Temperature ◽  
Copper Acetate ◽  
Far Infrared ◽  
Dimeric Complexes ◽  
Isotopic Studies ◽  
Stretching Vibration ◽  
Amine Adducts ◽  
Far Infrared Spectra ◽  
Ligand Bond

The far infrared spectra of 16 adducts of pyridine, quinoline, isoquinoline, urea, aniline, o- and p-toluidine with copper acetate, propionate, and butyrate, and of copper formate tetrahydrate were recorded at ambient temperature and at −196 °C. A range of derivatives were prepared containing isotopically pure 65Cu. The spectra of these derivatives were used to identify, unequivocally, the copper–oxygen stretching frequencies.Complexes believed to be polymeric (aniline and toluidine adducts) exhibit one copper–oxygen stretching vibration between 300 and 350 cm−1 A second band, lying between 350 and 400 cm−1 is not isotopically sensitive. The dimeric complexes exhibit one or two bands in the 300–400 cm−1 region, all of which are isotopically sensitive. Certain of the amine adducts exhibit an isotopically sensitive band near 240 cm−1 assignable to a Cu—N stretching mode.

Isotopic Studies of the Metal–Ligand Bond. Part I. Further Spectroscopic Studies of Copper Ethylenediamine Complexes: Copper–Nitrogen Vibrations

1972 ◽  
Vol 50 (23) ◽  
pp. 3866-3871 ◽  
Author(s):  
G. W. Rayner Canham ◽  
A. B. P. Lever
Keyword(s):  
Far Infrared ◽  
Spectroscopic Studies ◽  
Isotopic Substitution ◽  
Band Energy ◽  
Straight Line ◽  
Isotopic Studies ◽  
Metal Ligand ◽  
Ligand Bond

Confirmation of the far infrared (500–200 K) spectroscopic assignments of the metal–ligand vibrations in the complexes Cu(N–N)2X2 and Cu(N–N)X2((N–N) = ethylenediamine, symmetric and asymmetric N,N-dimethyl- and N,N-diethylethylenediamine, X = Cl, Br, NO3) has been obtained from copper isotopic substitution measurements. Extension of the series Cu(ethylenediamine)2X2 has provided some exceptions to the straight line correlation between [v(Cu—N)]2 and mean electronic d–d band energy. These are discussed.

The Crystal and Molecular Structures of Two Modifications of cis-Dichloro-mer-tris-(dimethylphenylphosphine)hydridoiridium(III)

1988 ◽  
Vol 41 (3) ◽  
pp. 283 ◽  
Author(s):  
GB Robertson ◽  
PA Tucker
Keyword(s):  
Heavy Atom ◽  
Molecular Structures ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
Bond Lengths ◽  
Metal Ligand ◽  
Ligand Bond

The structures of two crystalline modifications of mer -(Pme2Ph)3H-cis-Cl2IrIII, (1), have been determined from single-crystal X-ray diffraction data. Modification (A) is monoclinic, space group P21/c with a 12.635(1), b 30.605(3), c 14.992(2)Ǻ, β 110.01(2)° and Z = 8. Modification (B) is orthorhombic, space group Pbca with a 27.646(3), b 11.366(1), c 17.252(2)Ǻ and Z = 8. The structures were solved by conventional heavy atom techniques and refined by full-matrix least- squares analyses to conventional R values of 0.037 [(A), 8845 independent reflections] and 0.028 [(B), 5291 independent reflections]. Important bond lengths [Ǻ] are Ir -P(trans to Cl ) 2.249(1) av. (A) and 2.234(1) (B), Ir -P(trans to PMe2Ph) 2.339(2) av. (A) and 2.344(1), 2.352(1) (B), Ir-Cl (trans to H) 2.492(2), 2.518(2) (A) and 2.503(1) (B) and Ir-Cl (trans to PMe2Ph)2.452(2) av. (A) and 2.449(1)(B). Differences in chemically equivalent metal- ligand bond lengths emphasize the importance of non-bonded contacts in determining those lengths.

Thermochemical Aspects of Organotransition Metal Chemistry. Insights Provided by Metal-Ligand Bond Enthalpies

1990 ◽  
pp. 113-125 ◽  
Author(s):  
Michel R. Gagne ◽  
Steven P. Nolan ◽  
Afif M. Seyam ◽  
David Stern ◽  
Tobin J. Marks
Keyword(s):  
Metal Chemistry ◽  
Metal Ligand ◽  
Ligand Bond

Role of Metal–Ligand Bond Strength and Phase Separation on the Mechanical Properties of Metallopolymer Films

2013 ◽  
Vol 46 (14) ◽  
pp. 5416-5422 ◽  
Author(s):  
Aaron C. Jackson ◽  
Frederick L. Beyer ◽  
Samuel C. Price ◽  
B. Christopher Rinderspacher ◽  
Robert H. Lambeth
Keyword(s):  
Mechanical Properties ◽  
Phase Separation ◽  
Bond Strength ◽  
Metal Ligand ◽  
Ligand Bond

Thermodynamics of metal-ligand bond formation. XII. Adducts of Monothio-β-diketone complexes with pyridine and bipyridine

1974 ◽  
Vol 27 (6) ◽  
pp. 1351 ◽  
Author(s):  
DR Dakternieks ◽  
DP Graddon
Keyword(s):  
Thermodynamic Data ◽  
Benzene Solution ◽  
Bond Formation ◽  
Enthalpies Of Formation ◽  
Calorimetric Titration ◽  
Metal Ligand ◽  
Ligand Bond

Thermodynamic data are reported for the addition of pyridine and bipyridine in benzene solution to monothio-β-diketone complexes, ML2, of nickel(11), copper(11), zinc(11) and mercury(11). NiL2 gives NiL2(py)2 and NiL(bpy); ZnL2 gives ZnL2(py) and ZnL2(bpy); in both cases the data show that bipyridine is bidentate. CuL2 gives CuL2 (py) and CuL2 (bpy), with almost equal enthalpies of formation, but the higher stability of CuL2(bpy) shows bipyridine is probably bidentate. HgL2 gives HgL2(py) and a reaction with bipyridine which shows that an extremely unstable adduct is formed. All data were obtained by calorimetric titration.

Thermodynamics of metal-ligand bond formation

1977 ◽  
Vol 132 (1) ◽  
pp. 1-7 ◽  
Author(s):  
D.P. Graddon ◽  
J. Mondal
Keyword(s):  
Bond Formation ◽  
Metal Ligand ◽  
Ligand Bond
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