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 ϭ 1-amidino-O-methylurea) were solved by single crystal X-ray diffractome-
Two new saccharinate/NH 3 complexes of composition [Ni(sac) 2 (NH 3 ) 4 ] and [Zn(sac) 2 (NH 3 ) 2 ] were obtained and their crystal structures determined by single crystal X-ray diffractometry. The elongated octahedral Ni II complex crystallizes in the monoclinic P2 1 /c space group with Z ϭ 2 whereas the tetrahedral Zn II complex is triclinic (space group P1 and Z ϭ 2). For [Ni(sac) 2 -619 (NH 3 ) 4 ] the magnetic moment and electron absorption spectrum were obtained and discussed. The infrared spectra of both complexes were also recorded and briefly commented.
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