Ligand structures chemistry

Synthetic and structural chemistry of heme derivatives with nitrogen oxide ligands 99ACR350. 

Bardaji, M., Laguna, A., Orera, V.M. and Villacampa, M.D. (1998) Synthesis, Structural Characterization, and Luminescence Studies of Gold(l) and Gold(lll) Complexes with a Triphosphine Ligand. Inorganic Chemistry, 37(20), 5125-5130. 

The two subsidiaries consider here are deCODE Biostructures and deCODE Chemistry. deCODE Biostructures provides solutions to its clients in gene synthesis, determination of three-dimensional protein-ligand structures, and pre-formulation screening... 

Diorganoboryloxides, R2BO, bearing bulky organic substituents are quasi-alkoxide ligands for main group and transition metals. Because of the 7r-acceptor properties of boron, these anions are weaker 7r-donors than alkoxides, and this is reflected in their structural chemistry. Diethylzinc reacted with the borinic anhydride (9-BBN)20, Scheme 82, to afford the alkylzincboryloxide [EtZnO(9-BBN)]4 129, which also crystallizes in heterocubic form.187... 

Structural Chemistry of the Free Ligands, Biuret, Biguanide... 

The information contained in karma s knowledge bases is based upon quantitative structure-activity relationships (QSAR), kinetic data, and structural chemistry. The combination of QSAR and kinetic data allows for the study of enzyme-ligand interactions. The Hansch approach to QSAR, based on a set of congeners, states ... 

The structural chemistry of oxo-iron aggregates is dominated by the presence of and /<3-oxo groups which, in conjunction with other ligands, confer stability to the polynuclear core. For structurally characterized synthetic complexes, the degree of aggregation varies to date from three to eleven, but neither a decanuclear nor any odd numbered intermediate size is known. 

Many complexes with stable homonuclear diatomic ligands like Oj and N2 are well known and have been extensively studied. Only in recent years has the chemistry of metal complexes containing one or more coordinated homonuclear sulfur ligands, (with ra = 2 or n > 2), been developed systematically. Complexes with units can be obtained for many metals under a variety of conditions, and coordinated ligands exhibit an especially rich structural chemistry. 

It turns out that the six-membered Cu3( -8)3 rings are paradigmatic units. This type of ring system has been incorporated into current models of metallothioneins [low-molecular-weight proteins which are believed to play a key role in metal metabolism (cf. references in 136)]. The structural chemistry of the Ag complexes seems to be different. Monocyclic Ag(8 ) rings can be linked via bridging ligands as in [(86)Ag(88)Ag(86)] (133) or condensed as in [Ag2(86)2] " (28) (126). 

Schmidbaur, H., Classen, H. G., and Helbig, J. (1990). Aspartic and glutamic acid as ligands to alkali and alkaline-earth metals Structural chemistry as related to magnesium therapy. Angew. Chem., Int. Ed. Engl. 29, 1090-1103. 

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