ABSTRACT
In the title compound, [Ag(C(14)H(10)N(4)O)(2)]CF(3)SO(3), two N atoms from two independent pyridyl rings of two N'-3-cyano-benzyl-ideneisonicotinohydrazide ligands coordinate to the unique Ag(I) ion, forming a nearly linear coordination geometry. Adjacent silver complexes are primarily linked together by Agâ¯N inter-actions, with Agâ¯N separations of 2.877â (2) and 3.314â (2)â Å. On the other hand, one CF(3)SO(3) (-) anion inter-acts with hydrazone groups of two neighbouring ligands via N-Hâ¯O hydrogen bonds. These weak inter-molecular inter-actions contribute to the formation of supra-molecular chains. In addition, there are Agâ¯O inter-actions [2.787â (2)â Å] between Ag and O atoms from adjacent chains.
ABSTRACT
All non-H atoms except for the Cl atoms lie on a mirror plane in the title complex, [ZnCl(2)(C(16)H(16)N(2)O(2))]. The Zn(II) ion is coordinated by two N atoms from a bis-chelating 2,9-dieth-oxy-1,10-phenanthroline ligand and two symmetry-related Cl atoms in a distorted tetra-hedral environment. The two Zn-N bond lengths are significantly different from each other and the N-Zn-N angle is acute. In the crystal structure, there are weak but significant π-π stacking inter-actions between phenanthroline rings, with a centroid-centroid distance of 3.764â (1)â Å.
ABSTRACT
In the title centrosymmetric complex, [Ag(2)(ClO(4))(2)(C(10)H(7)N(3))(2)], the unique Ag(I) ion is coordinated by an N atom from a carbonitrile group, an N atom from a symmetry-related pyrazole group and an O atom of a perchlorate ligand to form a distorted T-shaped environment. Two 3-(1H-pyrazol-1-yl)benzonitrile ligands each bridge two Ag(I) ions to form a dinuclear complex. In the crystal structure, there are weak Agâ¯O inter-actions within the range 2.70-3.01â Å linking dimeric units into layers approximately parallel to (100). The O atoms of the perchlorate ligand are disordered over two sites with occupancies of 0.570â (11) and 0.430â (11), respectively.
ABSTRACT
In the title polymer, [Cd(C(2)N(3))(2)(C(16)H(16)N(2)O(2))](n), the Cd(II) ion is coordinated by two N atoms from one 2,9-dieth-oxy-1,10-phenanthroline mol-ecule and four N atoms from four symmetry-related dicyanamide ions in a distorted octa-hedral geometry. In the 2,9-dieth-oxy-1,10-phenanthroline ligand, the O and C atoms of the eth-oxy groups are located almost in the plane defined by the phenanthroline ring system. Two dicyanamide ions bridge two Cd(II) ions, which are located on a twofold axis, forming a one-dimensional zigzag chain along the [001] direction. The 2,9-dieth-oxy-1,10-phenanthroline mol-ecules act as bidentate terminal ligands. There are π-π inter-actions between polymeric chains, characterized by a centroid-centroid distance of 3.7624â (2)â Å between the phenanthroline rings of two neighbouring chains.
ABSTRACT
In the title compound, {[Ag(C(14)H(10)N(4)O)(2)]CF(3)SO(3)}(n), the unique Ag(I) ion is coordinated by two N atoms from two pyridine rings of two independent N'-(4-cyano-benzyl-idene)nicotinohydrazide ligands and one N atom of a carbonitrile group of a symmetry-related N'-(4-cyano-benzyl-idene)nicotino-hydrazide ligand, forming a distorted T-shaped coordination environment. One of the independent ligands acts as a bridge connecting Ag(I) ions, forming chains along the a axis. In the crystal structure, two neighbouring anti-parallel chains are connected through N-Hâ¯O hydrogen bonds. In addition, there are relatively short Agâ¯O contacts of 2.723â (3)â Å, which connect the chains into a three-dimensional structure.
ABSTRACT
In the title polymer, {[Ag(C(14)H(10)N(4)O)(2)]PF(6)}(n), each Ag(I) ion is coordinated by two N atoms from two pyridyl rings of independent N'-(4-cyano-benzyl-idene)nicotinohydrazide ligands, and one N atom from one carbonitrile group of a symmetry-related ligand in a distorted T-shaped geometry. The ligands exhibit two modes of coordination. One acts as a bridge connecting Ag atoms to form one-dimensional chains along [01]. The other acts as a terminal monodentate ligand, coordinating to Ag through its pyridyl N atom. Two neighbouring anti-parallel chains in the crystal are connected through N-Hâ¯O hydrogen bonds. Other adjacent chains are packed via Agâ¯O inter-actions, with Agâ¯O separations of 2.876â (2)â Å. In addition, PF(6) (-) counter-anions inter-act with the hydrazone groups through N-Hâ¯F hydrogen bonds. The PF(6) (-) anion is disordered over two sites, with occupancies of 0.773â (8) and 0.227â (8).
ABSTRACT
In the title complex, [CuCl(C(16)H(16)N(2)O(2))(2)]ClO(4), the Cu(II) ion is coordinated by four N atoms from two chelating 2,9-dieth-oxy-1,10-phenanthroline ligands and one chloride ion in a slightly disorted trigonal-bipyramidal environment. Two N atoms and the Cl atom are in equatorial positions while the remaining two N atoms occupy apical sites, the equatorial Cu-N bonds being significantly longer than the two apical Cu-N bonds. The N=C-O-C torsion angles involving the four eth-oxy groups are in the range 161.5â (8) to 177.0â (5)°. In the crystal structure, there are significant π-π stacking inter-actions between inversion-related rings of phenanthroline groups with centroid-centroid distances in the range 3.649â (4)-3.790â (4)â Å.