cis-Bis(dicyanamido)bis(1,10-phenanthroline)manganese(II) andcis-bis(dicyanamido)bis(1,10-phenanthroline)zinc(II)

Abstract

The title compounds are isomorphous, comprised of neutral monomeric [M(phen)(2)(dca)(2)] [(I): M = Mn, (II): M = Zn; phen is 1,10-phenanthroline, C(12)H(8)N(2); dca is dicyanamide, C(2)N(3)] molecules. In the molecule, the divalent metal ion is in a distorted octahedral coordination environment formed by six N atoms from the phen and dca ligands. The Mn-N [2.144 (2)-2.319 (2) A] and Zn-N [2.075 (2)-2.245 (2) A] distances are in agreement with the difference in size of the two divalent ions.

Bis(4,7-dichloro-1,10-phenanthroline-κ2N,N′)bis(dicyanamido-κN)copper(II)

“…The Cu II atom is coordinated by two chelating 4,7-Cl-phen molecules and by two dicyanamide ligands in a cis arrangement, forming a distorted octahedral geometry. Similar cis coordination of two dca ligands was observed in [M(phen) 2 (dca) 2 ] compounds with M = Ni (Wu et al, 2004), Cd (Lan et al, 2005), Mn and Zn (Wang et al, 2000) and Cu (Potočňák et al, 1995), which are mutually isostructural. The equatorial plane in the title compound is occupied by three N atoms of two 4,7-Cl-phen molecules with Cu-N distances between 2.0267 (17) and 2.0575 (17) Å while the fourth position is occupied by N1 atom of dca at a shorter distance of 1.9707 (18) Å (Table 1).…”

Synthesis, Crystal Structures, Thermal and Antimicrobial Properties of Mn(II) Complexes of 1,10-Phenanthroline With Some Co-Ligands

“…The asymmetric unit consists of two 1,10-phenanthroline molecules, two monodentate non-bridging dicyanamido anions, and one Mn(II) ion. A similar structure with slightly different parameters, obtained by a 1:1:1 reaction of Mn(OAc) 2 •4H 2 O, Na(dca), and o-phen in an ethanol/water mixture, has been reported (Wang, Luo et al 2000 (Wang, Luo et al 2000. The longer Mn-N(phen) bonds [Mn(1) -N(2) 2.2897(13), Mn(1)-N(4) 2.3214 14] are trans to each other [N(2)-Mn(1)-N(4) 85.19(5)°].…”

“…The N(5)-Mn(1)-N(8) bond angle of 98.21(6)2(6)° indicates that the Mn1-N5 and N8-Mn1 bonds are in two different molecular planes almost perpendicular to each other. The dicyanamido anions do not coordinate linearly [N8-C27-N9 173.4(2)°, N5-C25-N6 171.7(2)°] to the metal centre as observed in other Mn-dca complexes (Wang, Luo et al 2000. The two phen ligands which form five-membered chelate rings with Mn are oriented in two different molecular planes.…”