Tris glycinato cobalt III

Not only can the a-methylene carbanion be produced and stabilized, but it can also undergo base-catalyzed aldol-type reactions without decomposition of the chelate ring. The most-studied reactions involve carbanion additions to acetaldehyde to produce threonine and allothreonine. This can be achieved for bis(glycinato)copper(II),48,49 tris(glycinato)cobalt(III)50,51 or glycinato-bis(l,2-diaminoethane)cobalt(III),52 with the best yield being obtained in the last case, where the... 

Glycine has the structure NH2CH2COOH. It can lose a proton from the carboxyl group and form chelate rings bonded through both the N and one of the O atoms. Draw structures for all possible isomers of tris(glycinato)cobalt(III). 

One of the earliest cases of stereoisomerism among inner complexes, tris(glycinato)cobalt(III), occurs in two forms, violet (a) and red (P). In one of these geometric isomers, all of the amino groups of the glycine molecules are adjacent (fac), while in the other, two of these occupy opposite positions mer). Absorption spectra indicate that the more soluble violet a form is the mer isomer. " ... 

According to Ley and Winkler, mer(a)-tris(glycinato)cobalt(III) forms large, dark violet, rhombic crystals containing two molecules of water of crystallization, while /flcO)-tris(glycinato)cobalt(III) forms reddish pink, needlelike crystals with one molecule of water of crystallization. Contrary to these results, our analytical and thermogravimetric data have shown the pink form to be anhydrous and the violet form to be a monohydrate. The number of molecules of water of crystallization varies with conditions of drying. 

Assign the following to their appropriate point groups, a. tris(oxalato)chromium(lll) b. tris(carbonato)cobalt(III) c. tris(glycinato)cobaIt(III)... 

N3C0O6QH12, Cobalt(III), tris(glycinato)-fac- and mer-, 25 135 N3C0O6C9HU, Cobalt(III), tris(alaninato)-fac- and mer-, 25 137 N3F,204P3CioHi4, PoIy[2,2-dimethyI-4,4,6,6-tetrakis(2,2,2-trifluoroethoxy)-catenatriphosphazene-1,6-diyI], 25 67 N3Fi204P3SiCi3H22, PoIy[2-methyl-4,4,6,6-... 

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