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A second monoclinic polymorph of di-?-chlorido-bis-(chlorido{2-[(4-ethyl-phen-yl)imino-meth-yl]pyridine-?²N,N'}copper(II)).

ABSTRACT: The title compound, [Cu?Cl?(C??H??N?)?], is a new polymorph of a previously reported compound [Dehghanpour et al. (2011 ?). Acta Cryst. E67, m1296]. The current polymorph was obtained from an acetonitrile solution of the title compound. Like the first polymorph, it is monoclinic (space group P2?/c). The unique Cu(II) ion in the title centrosymmetric dinuclear complex is in a distorted trigonal-bipyramidal coordination environment formed by the bis--chelating N-heterocyclic ligand, two bridging Cl ligands and one terminal Cl ligand. In the crystal, weak C-H?Cl hydrogen bonds are observed in addition to ?-? stacking inter-actions, with a centroid-centroid distance of 3.6597?(18)?Å.

SUBMITTER: Khalaj M

PROVIDER: S-EPMC3393187 | biostudies-other | 2012 Jul

REPOSITORIES: biostudies-other

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A second monoclinic polymorph of di-μ-chlorido-bis-(chlorido{2-[(4-ethyl-phen-yl)imino-meth-yl]pyridine-κ²N,N'}copper(II)).

Khalaj Mehdi M Dehghanpour Saeed S Mahmoudi Ali A Khalaj Arash A Lough Alan J AJ

Acta crystallographica. Section E, Structure reports online 20120616 Pt 7

The title compound, [Cu₂Cl₄(C₁₄H₁₄N₂)₂], is a new polymorph of a previously reported compound [Dehghanpour et al. (2011 ▶). Acta Cryst. E67, m1296]. The current polymorph was obtained from an acetonitrile solution of the title compound. Like the first polymorph, it is monoclinic (space group P2₁/c). The unique Cu(II) ion in the title centrosymmetric dinuclear complex is in a distorted trigonal-bipyramidal coordination environment formed by the bis--chelating N-heterocyclic ligand, two bridging C ...[more]

PMID: 22807755

Similar Datasets

Di-μ-chlorido-bis-(chlorido{2-[(4-ethyl-phen-yl)imino-meth-yl]pyridine-κN,N'}copper(II)).

Project description:The binuclear title complex, [Cu(2)Cl(4)(C(14)H(14)N(2))(2)], is located on a crystallographic inversion centre. The Cu(II) ion is in a distorted square-pyramid coordination environment formed by the bichelating N-heterocyclic ligand, two bridging Cl atoms and one terminal Cl atom. One of the bridging Cu-Cl bonds is significantly longer than the other.

| S-EPMC3200970 | biostudies-literature

Bis[2-(hy-droxy-imino-meth-yl)phenolato]nickel(II): a second monoclinic polymorph.

Project description:The title compound, [Ni(C(7)H(6)NO(2))(2)], (I), is a second monoclinic polymorph of the compound, (II), reported by Srivastava et al. [Acta Cryst. (1967), 22, 922] and Mereiter [Private communication (2002) CCDC refcode NISALO01]. The bond lengths and angles are similar in both structures. The mol-ecule in both structures lies on a crystallographic inversion center and both have an inter-nal hydrogen bond. The title compound crystallizes in the space group P2(1)/c (Z = 2), whereas compound (II) is in the space group P2(1)/n (Z = 2) with a similar cell volume but different cell parameters. In both polymorphs, mol-ecules are arranged in the layers but in contrast to the previously published compound (II) where the dihedral angle between the layers is 86.3°, in the title polymorph the same dihedral angle is 29.4°. The structure of (I) is stabilized by strong intra-molecular O-H?O hydrogen bonding between the O-H group and the phenolate O atom.

| S-EPMC3051639 | biostudies-literature

A second monoclinic polymorph of {2,6-bis[(2,4,5-trifluoro-phen-yl)imino-meth-yl]pyridine-?N,N',N''}dichloridonickel(II).

Project description:The asymmetric unit of the title compound, [NiCl(2)(C(19)H(9)F(6)N(3))], contains one half-mol-ecule residing on a crystallographic twofold rotation axis. The title compound crystallizes in space group C2/c while the previously reported polymorph was reported in P2(1)/c [Baldovino-Pantaleón et al. (2006 ?). Adv. Synth. Catal.348, 236-242]. The Ni(2+) ion exhibits a penta-coordinate distorted trigonal-bipyramidal NiCl(2)N(3) geometry, with two Cl atoms in the equatorial plane. In the crystal, mol-ecules are linked by inter-molecular C-F?? [F?centroid = 2.9676?(14)?Å] inter-actions.

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2-[(1,3-Benzo-thia-zol-2-yl)imino-meth-yl]-6-meth-oxy-phenol: a new monoclinic polymorph.

Project description:The title compound, C15H12N2O2S, is a P21/c polymorph of a previously reported P21/n polymorph [Büyükgüngör et al. (2004 ?). Acta Cryst. E60, o1414-o1416]. The dihedral angle between the benzo-thia-zole (r.m.s. deviation = 0.010?Å) and the benzene ring of 7.86?(6)° compares with 10.76?(10)° in the literature structure. The meth-oxy substituent is almost coplanar with the benzene ring to which it is attached [C-O-C-C torsion angle = 178.31?(14)°] and the conformation about the imine bond [1.287?(2)?Å] is E. There is an intra-molecular O-H?N hydrogen bond and the hy-droxy O and thio-ether S atoms are syn. In the crystal, columns are formed along the b axis as centrosymmetric dimeric aggregates, mediated by C-H?O inter-actions and linked by ?-? inter-actions between the thia-zole and benzene rings [centroid-to-centroid distance = 3.8256?(10)?Å].

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A second monoclinic polymorph of 2-(3,5-dimethyl-1H-pyrazol-1-yl)-2-hy-droxy-imino-N'-[1-(pyridin-2-yl)ethyl-idene]acetohydrazide.

Project description:The title compound, C14H16N6O2, is a second monoclinic polymorph of 2-[1-(3,5-dimeth-yl)pyrazol-yl]-2-hy-droxy-imino-N'-[1-(2-pyrid-yl)ethyl-idene] acetohydrazide, with two crystallographically independent mol-ecules per asymmetric unit. The non-planar mol-ecules are chemically equal having similar geometric parameters. The previously reported polymorph [Plutenko et al. (2012 ?). Acta Cryst. E68, o3281] was described in space group Cc (Z = 4). The oxime group and the O atom of the amide group are anti with respect to the C-C bond. In the crystal, mol-ecules are connected by N-H?N hydrogen bonds into zigzag chains extending along the b axis.

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Ethyl (E)-2-cyano-3-(4-methyl-phen-yl)acrylate: a second monoclinic polymorph.

Project description:The title compound, C13H13NO2, was previously described in space group P21/c by He et al. [Acta Cryst. (1993), C49, 2000-2002]. The ethyl group is disordered over two sets of sites in a 0.615?(10):0.385?(10) ratio. The C-O-C-C torsion angles containing the ethyl group are -111.6?(10) and 177.9?(7)°, while in the previously reported polymorph, the torsion angle is -167.3?(2)°. The molecules pack to form a three-dimensional structure in the ABAB style along the c-axis direction in the title compound, but parallel to the a-axis direction in the reported polymorph.

| S-EPMC3648277 | biostudies-literature

A second polymorph of aqua-{4-chloro-2-[(pyridin-2-ylmeth-yl)imino-meth-yl]-phenolato}copper(II) nitrate mono-hydrate.

Project description:The title complex, [Cu(C(13)H(10)ClN(2)O)(H(2)O)]NO(3)·H(2)O, was obtained by the reaction of 5-chloro-salicyl-aldehyde, 2-(amino-meth-yl)pyridine and copper nitrate in methanol. The first reported polymorph of this complex was triclinic [Liang et al. (2010 ?). Acta Cryst. E66, m40]. The present polymorph crystallized in the monoclinic space group P2(1)/c. The Cu(II) ion is in a square planar environment and is coordinated by one phenolate O, one imine N and one pyridine N atom of the tridentate Schiff base ligand and by one water O atom. In the crystal, mol-ecules are linked through inter-molecular O-H?O hydrogen bonds to form chains along the a axis.

| S-EPMC3297234 | biostudies-literature

Di-?-chlorido-bis-{chlorido[2-(2-furyl-methyl-imino-meth-yl)pyridine-?N,N']nickel(II)}.

Project description:The title dinuclear nickel(II) complex, [Ni(2)Cl(4)(C(11)H(10)N(2)O)(2)], lies on a centre of symmetry located at the centroid of the four-membered ring formed by the two Ni atoms and the bridging chloride ions. The Ni(II) atom is five-coordinated in a square-pyramidal geometry by the imine and pyridine N atoms of the Schiff base ligand, and by one terminal and two bridging Cl atoms. The Ni?Ni distance is 3.506?(2)?Å. The O atom of the furan substituent in the ligand unit is not involved in coordination to the Ni atom.

| S-EPMC2961345 | biostudies-literature

Di-?-chlorido-bis-({2-[(4-bromo-phen-yl)-imino-meth-yl]pyridine-?N,N'}-chloridomercury(II)).

Project description:The unique Hg(II) ion in the title centrosymmetric dinuclear complex, [Hg(2)Cl(4)(C(12)H(9)BrN(2))(2)], is in a distorted trigonal-bipyramidal coordination environment formed by the bis-chelating N-heterocyclic ligand, two bridging Cl atoms and one terminal Cl atom. One of the bridging Hg-Cl bonds is significantly longer than the other.

| S-EPMC2977257 | biostudies-literature

Dichlorido{2-[(4-iodo-phen-yl)imino-meth-yl]pyridine-?N,N'}copper(II).

Project description:The Cu(II) atom in the title complex, [CuCl(2)(C(12)H(9)IN(2))], has a square-planar coordination being N,N'-chelated by the Schiff base ligand, and by two Cl atoms. The geometry is distorted towards square pyramidal owing to a long Cu?Cl inter-action of 2.941?(1)?Å. This results in the formation of a zigzag chain structure propagating in the c-axis direction.

| S-EPMC2977602 | biostudies-literature

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