Summary
Complexes of the type M(AcLeu)2 · B2 (M = CoII, NiII or ZnII; B = H2O, py, 3-pic, 4-pic; AcLeu =N-acetyl-DL-leucinate ion) and M(AcLeu)2 B (M = CoII or ZnII and B = o-phen) were prepared and investigated by means of magnetic and spectroscopic measurements. The i.r. spectra of all the complexes are consistent with bidentate coordination of the amino acid to the metal ion. The room temperature solid state electronic spectra indicate that the symmetry of this species is closer toD 4h and that MO6 and MO4N2 chromophores are present in the M(AcLeu)2 · 2 H2O and M(AcLeu)2Bn · x H2O (B = py, 3-pic, 4-pic, n=2 and x=0 for M = NiII; B = o-phen, n=1 and x=0 for M = CoII; B = py, 3-pic, 4-pic, n=1 and x=1 for M = CoII) complexes, respectively. By comparing the Dq values of the amino acid and those of other N-substituted amino acids previously studied, a spectrochemical series of the the cobalt(II) and nickel(II) complexes is proposed. The1 H n.m.r. spectra of the zinc(II) complexes confirm the proposed stereochemistry.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G. Marcotrigiano, L. Menabue and G. C. Pellacani,J. Inorg. Nucl. Chem., 39, 1897 (1977) and refs. cited therein.
F. Haurowitz,The Chemistry and Function of Protein, Academic Press, New York, N.Y., 1963, p. 404.
G. Marcotrigiano, L. Menabue and G. C. Pellacani,Transition Met. Chem., 1, 229 (1976).
A. W. Herlinger, S. L. Wenhold and T. V. Long II,J. Am. Chem. Soc., 92, 6474 (1970).
A. W. Herlinger and T. V. Long II,J. Am. Chem. Soc., 92, 6481 (1970).
J. F. Pearson and M. A. Slifkin,Spectrochim. Acta, A28, 2403 (1972).
H. C. Freeman in G. L. Eichorn (Ed.),Inorganic Biochemistry, Elsevier, New York, N.Y., 1973, ch. 4 and refs. cited therein.
J. Catterick and P. Thornton,Advan. Inorg. Chem. Radiochem., 20, 291 (1977) and refs. cited therein.
S. T. Chow and C. A. McAuliffe,Progr. Inorg. Chem., 19, 51 (1975).
N. N. Greenwood and K. Wade,J. Chem. Soc., 1130 (1960).
E. Konig and E. Lindner,Spectrochim. Acta., A28, 1393 (1972).
F. Micheel and B. Schleppinghof.Chem. Ber., 88, 763 (1955).
A. B. P. Lever,Inorg. Chem., 4, 763 (1965).
I. S. Ahuja and R. Singh,Transition Met. Chem., 2, 182 (1977).
B. N. Figgis,Introduction to Ligand Fields, Interscience, New York, 1966, p. 242.
A. B. P. Lever,Inorganic Electronic Spectroscopy, Elsevier, Amsterdam, 1968, pp. 324, 336.
G. Marcotrigiano and G. C. Pellacani,J. Inorg. Nucl. Chem. Lett., 11, 634 (1975).
G. Marcotrigiano, L. Menabue, G. C. Pellacani and M. Saladini,Inorg. Chim. Acta, in press.
G. Marcotrigiano, L. Menabue and G. C. Pellacani,Bull. Chem. Soc. Japan, 50, 742 (1977).
G. Marcotrigiano, P. Morini, L. Menabue and G. C. Pellacani,Bull. Chem. Soc. France, 815 (1977).
G. M. Cole Jr. and B. B. Garrett,Inorg. Chem., 9, 1898 (1970).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Marcotrigiano, G., Morini, P., Menabue, L. et al. N-acetyl-DL-leucinate cobalt(II), nickel(II) and zinc(II) complexes. Transition Met Chem 4, 119–122 (1979). https://doi.org/10.1007/BF00618838
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00618838