LOW-TEMPERATURE STRUCTURE OF 2 COPPER-BASED PRECURSORS FOR MOCVD - AQUABIS(TERT-BUTYL ACETOACETATO)COPPER(II) AND BIS(DIPIVALOYLMETHANIDO)COPPER(II)

The Cu atoms in aquabis(tert-butyl acetoacetato)copper(II),[Cu(C8H13O3 )(2)(H2O)], and bis(dipivaloylmethanido)copper(II), [Cu(C11H19O2)(2)], adopt square-pyramidal and planar conformations, respectively, with a verage Cu--O distances of 1.933 Angstrom in the former (not including the water ligand) and 1.892 Angstrom in the latter. It is interesting to note that the lability of the tert-butyl and methyl groups in both structures, which renders even the location of the terminal C atoms di fficult, is reduced at T = 130 K, enabling location of all the protons in the difference Fourier map.