Diacetato complex

Studies on the acetate complexes of Nd(III) by Choppin et al. using the hypersensitive transition showed that the formation of the monoacetato complex did not alter the intensity of the band but produced a small red shift. Formation of the diacetato complex produced marked changes in intensity and red shift. These changes were interpreted as due to the penetration of the second acetate anion into the inner coordination sphere and causing a structural change [203]. These results may be interpreted as (i) initial addition of acetate forms an ion-pair complex, (ii) further addition of acetate results in entry of acetate into the inner coordination sphere of Nd(III) ion. Complex formation of Nd(III) with EDTA and NTA ligands was studied by the analysis of the bands due to 4G7/2 4Io/2 and... 

To a solution of 6.8 g (0.03 mole) of nickel diacetate tetrahydrate in 125 mL of methanol is added 8.0 g (0.025 mole) of weso-Meg[14]aneN4 2H20 (Sec. 2-A). The solution is stirred and heated at 60 for 1 hour. The red-brown solution is cooled to room temperature and filtered. The filtrate is warmed to redissolve the precipitated purple diacetato complex and 6.1 g (0.05 mole) of sodium perchlorate is added to produce an immediate precipitate of the yellow meso complex. The solution is stirred for 30 minutes and filtered. The solid is washed with methanol and then diethyl ether and is dried in vacuo over P40,o. Yield is 11 g (81%). Anal. Caled. for Ci6H36N4Cl208Ni C, 35.45 H. 6 69 N, 10.34. Found C, 35.61 H, 6.49 N, 10.40. 

Acefato-plumbo Complexes. See Diacetato-plumbo Complexes... 

X lO M s both measured at 300K. The results are consistent with acetate exchange controlled by loss of acetate and water respectively from Ni(H20)5Ac. In the latter case loss of water is followed by acetate entry and subsequent rapid dissociation of the diacetato species. (133) Equilibrium studies of Cr(ii) with formate ions in aqueous solution indicate the formation of a binuclear complex, analogous to the quadruply metal-metal bonded dichromium tetraacetate ... 

See also Bis(4-imino-2-pentanonato)copper(II) and bis(3-phenyl-imino-l-phenyl-l-butanonato)copper(II), synthesis 1 Complex carbonates of beryllium, synthesis 2 Dichloro(2,2 -iminodipyridine)zinc, diacetato(2,2 -imino-dipyridine)zinc, and dicyano(2,2 -iminodipyridine)zinc, synthesis 3... 

The following complexes, some of them expl, were prepd by Weinland Paul (Ref 1) and also studied by others (Refs 2, 3 4) Diacetato-diplimbo-bromate, (Pb2 aC2)(BrO 2 ... 

---