Limits...
Crystal structure of bis ­ [ trans -di ­ chlorido ­ bis(propane-1,3-di ­ amine- κ 2 N , N ′ )chromium(III)] dichromate from synchrotron data

View Article: PubMed Central - HTML - PubMed

ABSTRACT

The structure of the title compound, [CrCl2(tn)2]2[Cr2O7] (tn = propane-1,3-di­amine; C3H10N2), has been determined from synchrotron data. The asymmetric unit contains one CrIII complex cation and half a [Cr2O7]2− anion. In the complex cation, the CrIII ion is coordinated by the four N atoms of two propane-1,3-di­amine (tn) ligands in the equatorial plane and by two Cl atoms in a trans configuration, displaying a distorted octa­hedral coordination sphere. The two six-membered rings in the complex cation have an anti chair–chair conformation with respect to each other. The mean Cr—N(tn) and Cr—Cl bond lengths are 2.09 (1) and 2.320 (2) Å, respectively. The slightly bent dichromate anion is disordered over two sets of sites (occupancy ratio = 0.7:0.3) and has a staggered conformation. The crystal structure is stabilized by inter­molecular hydrogen bonds involving the NH2 groups of the tn ligands as donors and the O atoms of the [Cr2O7]2− anion and chlorido ligands as acceptors.

No MeSH data available.


The crystal packing of complex (I), viewed along the a-axis direction. Dashed lines represent N—H⋯O (pink) and N—H⋯Cl (cyan) hydrogen-bonding inter­actions.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5120710&req=5

fig2: The crystal packing of complex (I), viewed along the a-axis direction. Dashed lines represent N—H⋯O (pink) and N—H⋯Cl (cyan) hydrogen-bonding inter­actions.

Mentions: The cations and anions in the crystal structure are held tog­ether by hydrogen bonds (Table 1 ▸) between the NH2 donor groups of the tn ligand and Cl ligands and O atoms of the dichromate anion as acceptor groups. An extensive array of these contacts generate a three-dimensional network of mol­ecules stacked along the a-axis direction (Fig. 2 ▸).


Crystal structure of bis ­ [ trans -di ­ chlorido ­ bis(propane-1,3-di ­ amine- κ 2 N , N ′ )chromium(III)] dichromate from synchrotron data
The crystal packing of complex (I), viewed along the a-axis direction. Dashed lines represent N—H⋯O (pink) and N—H⋯Cl (cyan) hydrogen-bonding inter­actions.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5120710&req=5

fig2: The crystal packing of complex (I), viewed along the a-axis direction. Dashed lines represent N—H⋯O (pink) and N—H⋯Cl (cyan) hydrogen-bonding inter­actions.
Mentions: The cations and anions in the crystal structure are held tog­ether by hydrogen bonds (Table 1 ▸) between the NH2 donor groups of the tn ligand and Cl ligands and O atoms of the dichromate anion as acceptor groups. An extensive array of these contacts generate a three-dimensional network of mol­ecules stacked along the a-axis direction (Fig. 2 ▸).

View Article: PubMed Central - HTML - PubMed

ABSTRACT

The structure of the title compound, [CrCl2(tn)2]2[Cr2O7] (tn = propane-1,3-di­amine; C3H10N2), has been determined from synchrotron data. The asymmetric unit contains one CrIII complex cation and half a [Cr2O7]2− anion. In the complex cation, the CrIII ion is coordinated by the four N atoms of two propane-1,3-di­amine (tn) ligands in the equatorial plane and by two Cl atoms in a trans configuration, displaying a distorted octa­hedral coordination sphere. The two six-membered rings in the complex cation have an anti chair–chair conformation with respect to each other. The mean Cr—N(tn) and Cr—Cl bond lengths are 2.09 (1) and 2.320 (2) Å, respectively. The slightly bent dichromate anion is disordered over two sets of sites (occupancy ratio = 0.7:0.3) and has a staggered conformation. The crystal structure is stabilized by inter­molecular hydrogen bonds involving the NH2 groups of the tn ligands as donors and the O atoms of the [Cr2O7]2− anion and chlorido ligands as acceptors.

No MeSH data available.