Study of the nature of metal—ligand bond in zinc, cadmium and mercury areneseleninato complexes

The reactions of 0,O-dialkyldithiophosphato complexes, {(R0)2PSz}zM (M = Zn, Cd, Hg), to form dimers and 1 : 1 and 1 : 2 adducts with pyridine have been studied calorimetrically in benzene solution a t 30�C. While variation of the alkyl group has little effect, variation of the metal atom causes marked changes in both free energies and enthalpies of reaction. Average values of thermodynamic data obtained are as follows (AGOao3 and AH0300 in k J mol-l, AS0a03 in J K-l mol-l) :

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

Australian Journal of Chemistry ◽

10.1071/ch9880283 ◽

1988 ◽

Vol 41 (3) ◽

pp. 283 ◽

Cited By ~ 5

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.

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

Metal-Metal Bonds and Clusters in Chemistry and Catalysis ◽

10.1007/978-1-4899-2492-6_9 ◽

1990 ◽

pp. 113-125 ◽

Cited By ~ 4

Author(s):

Michel R. Gagne ◽

Steven P. Nolan ◽

Afif M. Seyam ◽

David Stern ◽

Tobin J. Marks

Keyword(s):

Metal Chemistry ◽

Metal Ligand ◽

Ligand Bond

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

Macromolecules ◽

10.1021/ma401077d ◽

2013 ◽

Vol 46 (14) ◽

pp. 5416-5422 ◽

Cited By ~ 42

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

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

Australian Journal of Chemistry ◽

10.1071/ch9741351 ◽

1974 ◽

Vol 27 (6) ◽

pp. 1351 ◽

Cited By ~ 10

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.

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