Related Ligands

Complexes of acac and Related Ligands.—Mechanisms of isomerization of -diketone complexes have been the subject of a review. Two studies of isomerization and racemization rates of diketone complexes establish orders of relative reactivity for complexes of various cations. For complexes M(tfac)a, rates of isomerization are in the following order  

Kinetic parameters for isomerization or racemization of particular complexes of transition-metal cations of general formula M(diketone)s are listed in Table 15. For unsymmetrical 8-diketone ligands, rates of isomeriza- 

Isomerization and racemization of jS-diketone complexes of aluminium and of gallium are still the subject of kinetic investigations recently reported results are collected in Table 16. As for these reactions of transition-metal 

Kinetic results for rearrangement of several complexes of the type [MCdiketonejaLg] have been reported. A qualitative study of a series of compounds [Co(acac)2(N02)(amine)] has demonstrated an order of 

Macrocyclic N-Donors. Glick et al. have proposed that the greater difference in Co—X axial bond length between the cobalt(n) and cobalt(m) complexes of (16) compared with the corresponding complexes of (17) accounts for the unusually slow self-exchange rate of the former. The electronic spectra of the five-co-ordinate cobalt(n) complexes of the macrocycles (18) and (19) have been reported.100 

Busch et al.102 have reported the electrochemical reduction of complexes of tetra-aza[16]annulene (20), to the porphyrin-like dianion. The Con(taab)2+ ion can be 

The cobalt(n) complexes of protoporphyrin-IX dimethylester and mesoporphyrin-IX dimethylester have been reduced polarographically.113 The original study by Stynes and Ibers114 of the oxygenation of the amine complexes of cobalt(n) protoporphyrin-IX dimethylester has been criticized by Guidry and Drago,115 who suggest that the treatment of the data was incorrect and that the system is ill-defined. Ibers et al.116 have reconsidered their data and claim that this substantiates the earlier work and proves that the system is clearly defined. 

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It is conceivable that related ligands, e.g. dehydrocorrins, could be obtained from pyrrolic units using pathways similar to those used for porphyrins and could be hydrogenated to corrins. This has indeed been achieved (I.D. Dicker, 1971), but it is, of course, impossible to introduce the nine chiral centres of cobyrinic acid by such procedures. 

Bis(trifluoromethyl)cadinium reagent undergoes a related ligand-exchange process [S] (equation 6)... 

Transition metal complexes containing allenylidene, cumulenylidene, and related ligands with heterocyclic fragments 98CRV2797. 

It is believed [1135,1136] that the decomposition of metal complexes of salicyaldoxime and related ligands is not initiated by scission of the coordination bond M—L, but by cleavage of another bond (L—L) in the chelate ring which has been weakened on M—L bond formation. Decomposition temperatures and values of E, measured by several non-isothermal methods were obtained for the compounds M(L—L)2 where M = Cu(II), Ni(II) or Co(II) and (L—L) = salicylaldoxime. There was parallel behaviour between the thermal stability of the solid and of the complex in solution, i.e. Co < Ni < Cu. A similar parallel did not occur when (L—L) = 2-indolecarboxylic acid, and reasons for the difference are discussed... 

The electronic structure of cobalt(II) complexes with Schiff bases and related ligands. C. Daul, C. W. Schlapfer and A. von Zelewsky, Struct. Bonding (Berlin), 1979,36,129-171 (76). 

Transition metal complexes containing organoimido (NR) and related ligands. W. R. Nugent and... 

Optical activity of cobalt(III), chromium(III) and rhodium III) complexes with aminopolycarboxy-late, edta-type and related ligands. D. J. Radanovic, Coord. Chem. Rev., 1984, 54, 159-261 (195). 

Coordinating properties of the amide bond. Stability and structure of metal ion complexes of peptides and related ligands. H. Sigel and R. B. Martin, Chem. Rev., 1982, 82, 385-426 (409). 

Metal chelates of pyridine-2-aldehyde-2 -pyridylhydrazone (paphy) and related ligands. C. F. Bell, Rev. Inorg. Chem., 1979,1,133—161 (46). 

Complex formation between palladium(II) and amino acids, peptides and related ligands. L. D. Pettit and M. Bezer, Coord. Chem. Rev., 1985, 61, 97 (90). 

Coordination chemistry of organomercury(II) involving phenanthrolines, bipyridines, tertiary phos-phines/arsines and some related ligands. T. S. Lobana, Coord. Chem. Rev., 1985,63,161 (186). 

Sulfoxides, Amides, Amine Oxides and Related Ligands... 

Hydroxamates, Cupferron and Related Ligands Sulfur Ligands... 

Agbossou E., Carpentier J. E. Hapiot E., Suisse I., Mortreux A. The Aminophos-phine-Phosphinites and Related Ligands Synthesis, Coordination Chemistry and Enantioselective Catalysis Coord. Chem. Rev. 1998 I78-I80 1615-1645 Keywords stereoselective Diels-Alder reaction catalysts, aminophosphine-phosphinites, enantioselective catalysts... 

Daul C, Schlapfer CW, von Zelewsky A (1979) The Electronic Structure of Cobalt(II) Complexes with Schiff Bases and Related Ligands. 36 129-171 Davidson G, see also Maroney MJ (1998) 92 1-66 Dawson JH, see Andersson LA (1991) 74 1-40... 

Abstract While the use of stoichiometric amounts of sparteine and related ligands in various asymmetric reactions often lead to highly enantioselective transformations, there have been far fewer applications of sparteine to asymmetric catalysis. The aim of this review is to highlight recent advances in the field of asymmetric transformations that use sparteine as chiral auxiliary, emphasizing the use of substoichiometric or catalytic amounts of this ligand. 

Bulak, E., Sarper, O., Dogan, A., Lissner, F., Schleid, T. and Kaim, W. (2006) Dichlorogold(III) complexes of bis(l-methyl-2-imidazolyl)ketone and related ligands Geometrical and electronic structures. Polyhedron, 25, 2577. 

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