Other mixed donor ligands

Other mixed donor ligands. The preparation of Cs[Co(edda)X2] (edda = ethylenediamine-iViV -diacetate. X = NO2 or N3 — ox) complexes has 

Tanaka, K. Sato, and H. Ogina, Inorg. Nuclear Chem. Letters, 1972, 8, 93. 

ClCgH ) form the complexes [Co(dmg)2(Rthiosh)2]Cl2, [CoCl2(dmg)2-(Rthiosh)], and [Co(Rthiosh) The ligand (105) forms the complex Na- 

Polynuclear anion-hridged complexes. The structure of [(NH3)3(H20)Co-(p-OH)2Co(H20XNH3)3](N03), 2H20 has been reported, although it was not possible to distinguish between the ammine and aquo ligands. When [Co(acac)2] in methanol, containing KOAc, is treated with H2O at 25°C for 1 h, [(acac)2Co(p-OH)2Co(acac)2] is formed. The structure of rac- 

Battistoni, G. Mattogna, A. Monaci, and F. Tarli, Inorg. Nuclear Chem. Letters, 1971, 7, 1081. A. V. Ablov, N. V. Gerbeleu, and M. V. Shopron, Russ. J. Inorg. Chem., 1972, 17, 384. 

Other mixed donor ligands. The complexes [Co(edda)(H20)(amine)]C104, a-cis-[Co(edda)(amine)2]C104, 3-cis-[Co(edda)(NH3)2]C104,P-ds-[Co(edda)-(en)C104] and complexes of edda, NiV -Me2edda, and NiV -Et2edda with 

One geometrical isomer of the cobalt (iii) complex of ethylenediamine-iViV -diacetate-iViV -dipropionate (edda) has been prepared by oxidation of C0CI2 with H2O2 in the presence of edda. It has been resolved into optical isomers and spectral evidence suggests that its structure is (107). The structure of K[ds-Co(ida)2],2.5H20 (ida = iminodiacetate) has been determined. Cobalt(iii) complexes of (S)-azetH (108) have been prepared. One isomer of 

1-amino-3,3,3-trifluoropropan-2-ol) has been obtained. The free hydroxy-groups in C0L3 (L = N-2-hydroxyethyl- or JV-2-hydroxypropyl-ethylenedi-amine) undergo acylation reactions. iVJV-Dialkyl-ethylenediamine N-oxides (alkyl = methyl, ethyl, or propyl) act as bidentate donors in the complex cation [Co(R2enNO)3]. Pyruvic acid-amide-thiosemicarbazone and pyruvic acid-diethylamide-thiosemicarbazone (LH) form the complexes [Co-L2]X (X = Cl, Br, NO3, or C10J ° and the thiosemicarbazone of benzoyl-formic acid also acts as a terdentate donor towards cobalt(iii).  

The resolution of uns-cis (or P-cis)-[CoL(edda)] (L = C03, ox, mal) and their c.d. spectra have been compared with those of the S-cis (or ot-cis) isomers, in an attempt to assess the contribution of vicinal and configurational effects and chelate ring size to rotatory strengths.389 The changes observed in the c.d. spectra could be related to the arrangement of the chelate rings and to the configuration about the asymmetric 

Celap et al. have prepared three of the five possible isomers of [Co(glycinate)2-(N02)2] and have shown that these rearrange into the stable fourth isomer which 

The first example of absolute chiral recognition of a prochiral centre by a small molecule (cf. enzyme reactions) is the reaction of A( — )436-oc[(2S,9S)-2,9-diamino-4,7-diazadecanecobalt(m)]dichloride with a,a-aminomethylmalonate, which produces A( — )436-P2[(2S,9S)-2,9-diamino-4,7-diazadecanecobalt(in)-(R)-aminomethyl-malonate]+,401 and a crystal structure determination of the product has been performed.402 

X-Ray crystal structure data on [Co(ete)(N02)Cl]Cl (ete = l,9-diamino-3,7-dithianonane) indicates the complex to have the uns-cis structure with the nitro-group trans to the nitrogen and the chlorine trans to the sulphur, showing that in its formation from u-cis[Co(ete)(N02)2]+ the greater trans effect of sulphur allows the trrws-nitro-group to be replaced.403 

Murray-Rust and P. Murray-Rust. Acta Cryst., 1973, B29, 2606. 

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An assortment of other mixed donor ligand complexes of oxo-rhenium(V) are also known but these are not particularly well characterized and, generally speaking, their structures are uncertain. These data include the complexation of Rev by such ligands as 2-aminobenzenethiol,372 thiosemi-carbazides,373 l-methyl-2-mercaptoimidazole374 and 2-mercaptobenzothiazole.345 Recently, the pyr-azolylborate complex ReOCl2[HB(pz)3] has been prepared.572... 

Other key heterocyclic rings in mixed donor ligands are pyrazole and imidazole. A review of pyrazole-derived ligands has appeared an example is 1-thiocarbamylpyrazole (56). Ligands with a thiol introduced at the imidazole 2-position form complexes with N,S four-membered chelate rings, as occurs for (57). Another example of a N,0 chelate is (N-methyl-2-imidazolyl)methylsulfoxide (58). 

Other polydentate and macrocyclic mixed-donor ligands 365... 

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