Synthesis and characterization of mixed ligand complexes of cobalt(II) and nickel( II) containing trans-[14]-diene and organic monobasic acids Synthesis and spectral studies of some aluminium(lll) complexes of N-protected amino acids

Abstract

A series of aluminium complexes of general formula AlCl_3-n[OOCCH(R)<img src='http://www.niscair.res.in/jinfo/equation44.gif' border=0>(O)]_n (where R= -CH₃, -CH₂C₆H₅ and n= 1,2,3) has been isolated by the interaction of aluminium trichloride with N-protected amino acids in 1:1, 1:2 and 1:3 molar ratios in dry diethyl ether solution. The tentative structures of these complexes have been suggested on the basis of elemental analyses, mol. wt. measurement and spectral studies. The freshly prepared complexes are monomers. ²⁷Al NMR reveals the presence of four-, five- and six-coordinate aluminium centres in the complexes, [AlCI₂(L)], [AlCl(L)₂] and [Al(L)₃], respectively.