Cobalt(II) and nickel(II) complexes ofN-protected amino acids. Crystal and molecular structure of bis (N-acetylglycinato)tetraaquocobalt(II) |
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| Authors: | L Menabue M Saladini L P Battaglia A Bonamartini Corradi G Marcotrigiano P Morini |
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| Institution: | (1) Dipartimento di Chimica, University of Modena, Via Campi 183, 41100 Modena, Italy;(2) Istituto di Chimica Generale e Inorganica Centra di Studio per la Strutturistica Diffrattometrica del C.N.R., University of Parma, Via D'Azeglio 85, 43100 Parma, Italy;(3) Istituto di Chimica, Facoltà di Medicina-Veterinaria, University of Bari, Via Gentile 182, 70126 Bari, Italy |
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| Abstract: | Binary complexes of formula M(II)(acgly)2(H2O)4] (M(II)=Co(II), Ni(II), acgly=N-acetylglycinate ion) were synthesized, and for the Co(II) complex the crystal and molecular structure was determined. The crystals are monoclinic, space groupP21/c,a=4.838(1),b=10.785(2),c=14.340(6) Å, =96.96(2)°,Z=2. The structure was solved by the heavy-atom method and refined through full-matrix least-squares calculations toR=0.0394 for 1069 observed reflections. The coordination around the cobalt atom is slightly elongated octahedral arising from one carboxylate oxygen of each of the two centrosymmetrically related monodentateN-acetylglycinate anions and four water molecules. |
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