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Transition Metal Promoted Addition of Methanol to Cyanoguanidine. Molecular Structure and Properties of the Generated Copper(II) and Nickel(II) Complexes
Author(s) -
Williams Patricia A. M.,
Ferrer Evelina G.,
Baeza Natalia,
Piro Oscar E.,
Castellano Eduardo E.,
Baran Enrique J.
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500002
Subject(s) - chemistry , triclinic crystal system , crystallography , nitrile , nickel , copper , transition metal , crystal structure , methanol , metal , infrared spectroscopy , stacking , molecule , inorganic chemistry , organic chemistry , catalysis
Abstract The reaction of the Cu II and Ni II complexes of saccharin with dicyandiamide (cyanoguanidine, cnge) in methanol produces the addition of methanol to the nitrile moiety of this molecule. Furthermore, the product of the reaction coordinates the metal centers generating two new complexes containing saccharinate as the counter anion. The crystal structures of [Cu(cnge‐OCH 3 ) 2 ](sac) 2 and of [Ni(cnge‐OCH 3 ) 2 ](sac) 2 ·2H 2 O (cnge‐OCH 3 = 1‐amidino‐O‐methylurea) were solved by single crystal X‐ray diffractometry. Both complexes crystallize in the triclinic space group ${\rm P}{\bar 1}$ and the metallic cations present a quite similar centrosymmetric planar conformation. The complexes were characterized by means of electronic and infrared spectroscopy and also their magnetic and thermal behavior was investigated.