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Trans-Dichloridobis(propane-1,3-diamine-κN,N')chromium(III) perchlorate.

ABSTRACT: In the title compound, [CrCl(2)(C(3)H(10)N(2))(2)]ClO(4), the Cr(III) atom is coordinated equatorially by four N atoms of two propane-1,3-diamine (tn) ligands and axially by two mutually trans Cl atoms, thus displaying a slightly distorted octa-hedral geometry with no crystallographically imposed symmetry. The two six-membered chair chelate rings in the complex cation are in an anti conformation with respect to each other. The Cr-N bond lengths range from 2.0831 (18) to 2.0917 (19) Å, and the Cr-Cl bond lengths are 2.3148 (6) and 2.3135 (6) Å. The perchlorate anions have slightly distorted tetra-hedral geometries. Weak inter-molecular hydrogen bonds involving the tn ligand NH groups as donors, and chloride ligands and anion O atoms as acceptors are observed.

SUBMITTER: Choi JH

PROVIDER: S-EPMC3052098 | biostudies-literature |

REPOSITORIES: biostudies-literature

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trans-Dichloridobis(2,2-dimethyl-prop-ane-1,3-diamine-?N,N')chromium(III) perchlorate.

Project description:In the title salt, [CrCl(2)(C(5)H(14)N(2))(2)]ClO(4), the Cr atom is in a trans-CrCl(2)N(4) octa-hedral environment comprising the four N atoms of two chelating 2,2-dimethyl-propane-1,3-diamine ligands and two Cl atoms. The two six-membered CrC(3)N(2) rings in the cation adopt anti chair-chair conformations with respect to each other. The perchlorate anion is disordered over two positions in respect of the Cl and an O atom in a 6:4 ratio. N-H?O hydrogen bonds link the cations and anions into a layer structure.

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Bis[trans-dichloridobis(propane-1,3-diamine-?(2)N,N')chromium(III)] tetra-chloridozincate determined using synchrotron radiation.

Project description:In the title compound, [CrCl(2)(C(3)H(10)N(2))(2)](2)[ZnCl(4)], the Cr(III) atom is coordinated by four N atoms of propane-1,3-diamine (tn) and two Cl atoms in a trans arrangement, displaying a distorted octa-hedral geometry with crystallographic inversion symmetry; the Zn atom in the [ZnCl(4)](2-) anion lies on a -4 axis. The orientations of the two six-membered chelate rings in the complex cation are in an anti chair-chair conformation with respect to each other. The Cr-N bond lengths are 2.087?(6) and 2.097?(6)?Å. The Cr-Cl and Zn-Cl bond lengths are 2.3151?(16) and 2.3255?(13)?Å, respectively. Weak inter-molecular hydrogen bonds involving the tn NH(2) groups as donors and chloride ligands of the anion and cation as acceptors are observed.

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Crystal structure of trans-bis-(ethane-1,2-diamine-?(2) N,N')bis-(thio-cyanato-?N)chromium(III) perchlorate from synchrotron data.

Project description:The structure of the title compound, [Cr(NCS)2(C2H8N2)2]ClO4, has been determined from synchroton data. The asymmetric unit consists of one half of a centrosymmetric Cr(III) complex cation and half of a perchlorate anion with the Cl atom on a twofold rotation axis. The Cr(III) ion is coordinated by the four N atoms of two ethane-1,2-di-amine (en) ligands in the equatorial plane and two N-bound thio-cyanate (NCS(-)) anions in a trans-axial arrangement, displaying a slightly distorted octa-hedral geometry with crystallographic inversion symmetry. The Cr-N(en) bond lengths are in the range 2.053?(16)-2.09?(2)?Å, while the Cr-N(thio-cyanate) bond length is 1.983?(2)?Å. The five-membered en rings are disordered over two sites, with occupancy ratios of 0.522?(16):0.478?(16). Each ClO4 (-) anion is disordered over two sites with equal occupancy. The crystal structure is stabilized by inter-molecular hydrogen bonds involving the en NH2 groups as donors and perchlorate O and thio-cyanate S atoms as acceptors.

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Project description:The asymmetric unit of the title compound, {[Cu(C(4)H(2)O(4))(C(3)H(10)N(2))(H(2)O)]·H(2)O}(n), consists of two Cu(II) atoms, half each of two propane-1,3-diamine ligands and two coordinated water mol-ecules, all lying on crystallographic mirror planes, also one fumarate dianion and one uncoordinated water mol-ecule in a general position. The Cu(C(3)H(10)N(2))(H(2)O) units are linked via fumarate dianions into a zigzag chain running along the a axis. A longer Cu-O distance [2.873 (3) Å] is to a water mol-ecule bridging equivalent Cu(II) atoms in adjacent chains, forming a three-dimensional framework. One of the Cu(II) atoms is in a distorted square-pyramidal environment and the other is in a pseudo-octa-hedral geometry of the [5+1] type. O-H⋯O and N-H⋯O hydrogen bonds are observed in the crystal structure.

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Project description:In the title compound, [CrF(C(8)H(20)N(4))(H(2)O)](ClO(4))(2)·H(2)O, the Cr atom is in a slightly distorted octa-hedral environment, coordinated by four N atoms of the 4,7-diaza-decane-1,10-diamine ligand, one water mol-ecule and an F atom trans to water. The five-membered chelate ring is in a gauche form, while the two six-membered chelate rings are in chair conformations. The crystal structure is stabilized by several hydrogen bonds.

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trans-Di-fluorido-tetra-kis-(pyridine-?N)chromium(III) perchlorate from synchrotron radiation.

Project description:The are two independent complex cations in the title salt, [CrF2(C5H5N)4]ClO4, each located on a centre of inversion, as well as an independent perchlorate counter-ion. The complex cations adopt slightly distorted octa-hedral coordination environments around the Cr(III) ion, defined by four pyridine (py) N atoms in the equatorial plane and two F(-) ligands in the axial positions; intra-molecular C-H?F contacts are noted. The mean Cr-N(py) and Cr-F bond lengths are 2.088?(6) and 1.8559?(10)?Å, respectively. The three-dimensional architecture is sustained by hydrogen bonds involving the pyridine C-H groups as donors, and F and O atoms as acceptors.

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Project description:In the title complex, [Cu(N(3))(2)(C(3)H(10)N(2))(2)], the Cu(II) ion resides on a centre of symmetry and is in a Jahn-Teller distorted octa-hedral coordination environment comprising two N atoms from azide anions in axial positions and four N atoms from propane-1,3-diamine (tn) ligands in equatorial positions. Inter-molecular N-H?N hydrogen bonds produce R(2) (1)(6), R(2) (2)(8), R(2) (2)(12) and R(4) (2)(8) rings, generating a two-dimensional layer.

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Project description:In the title complex, [Ni(CH(3)COO)(2)(C(3)H(10)N(2))(2)]·2H(2)O, the Ni(II) atom resides on a centre of symmetry and is in an octa-hedral coordination environment comprising four amino N atoms and two carboxyl-ate O atoms. Inter-molecular N-H?O and O-H?O hydrogen bonds produce R(2) (1)(6), R(2) (2)(12), R(3) (2)(8) and R(5) (5)(16) rings, which generate a two-dimensional polymeric network parallel to (001).

| S-EPMC2984075 | biostudies-literature

cis-Dichloridobis(1,10-phenanthroline)chromium(III) chloride.

Project description:In the title complex, [CrCl(2)(C(12)H(8)N(2))(2)]Cl, the Cr(III) ion is situated on a twofold rotation axis and displays a slightly distorted octa-hedral CrCl(2)N(4) coordination geometry. The Cr environment is composed of a cis arrangement of two 1,10-phenanthroline and two chloride ligands. The chloride counter-anion exhibits half-occupation and is equally disordered over two positions.

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