Ligands molecular structure

However, despite large differences in ligand molecular structure, all of the hydroxamate siderophores whose structures have been determined to date have been found to be cis complexes with a coordination geometry about the ferric ion which is substantially identical to the simple tris-(benzhydroxamato)-Fe(III) complex. Thus, while ferrioxamine E is racemic but with a cis geometry (13), x-ray structure analyses of ferrichrome A (14) and ferrichrysin (15) have shown both to be A-cis isomers. 

R. Mukherjee Coordination chemistry with pyrazole-based chelating ligands Molecular structural aspects 2000CCR151... 

Hubert-Pfalzgraf L.G., Kessler V.G., Vaisserman J. Soluble Ni alkoxides based on dimethy-laminoisopropoxide ligands molecular structure of [Li(Pr OH)Ni (jj -OR)2C1]2 and of cis-NiCl2(ROH)2 (R= CHMcCH2NMe2). Polyhedron 1997 16 4197... 

Naziruddin AR, Kuo C-L, Lin W-J, etal. Ruthenium complexes bearing unsymmettic CNC pincer ligands molecular structures and electronic properties. Organometallics. 2014 33 2575-2582. 

The ligand used for determination of nonspecific binding has a different molecular structure from the tracer ligand. 

Moreover, molecular modeling is one key method of a wide range of computer-assisted methods to analyze and predict relationships between protein sequence, 3D-molecular structure, and biological function (sequence-structure-function relationships). In molecular pharmacology these methods focus predominantly on analysis of interactions between different proteins, and between ligands (hormones, drugs) and proteins as well gaining information at the amino acid and even to atomic level. 

In a systematic study, it was demonstrated that, using a specially designed bulky benzamidinate ligand, it is possible to isolate mono(amidinato) dialkyl complexes over the full size range of the Group 3 and lanthanide metals, i.e., from scandium to lanthanum. The synthetic methods leading to the neutral and cationic bis(alkyls) are summarized in Scheme 56. Figure 18 displays the molecular structures of the cations obtained with Sc, Gd, and La. ... 

In nickel and palladium dithiobenzoato complexes, four-membered chelate rings are formed (366), whereas, in the corresponding phenyl-dithio acetates [M2(S2CCH2Ph)4], the dithio ligands act as bridging groups between the two metal atoms, with the formation of binuclear units (367). The molecular structure of the latter compounds shows that each metal atom is coordinated to four sulfur atoms and to the other metal atoms in a square-pyramidal geometry. Other evidence for... 

Molecular Structures of MesAl complexes of dipyrldyl based ligands... 

In an attempt to change the electronics of the chromium atom, we are replacing the carbon based cyclopentadienyl ring with ligands containing harder donor atoms. For example, we have employed the tris(pyrazolyl)borate moiety, an isoclectronic replacement for Cp featuring tridentate N-coordination.[9] Figure 2 shows the molecular structure of Tp SU Cr-Ph, a representative Cr° alkyl. It will be noted, that this complex is mononuclear, due to the steric protection of the extremely bulky tris(pyrazolyl)borate. 

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