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Synthesis, Conformational Structure and Spectroscopic Properties of trans-diazidobis(2,2-dimethyl-1,3-propanediamine)chromium(III) Perchlorate

Synthesis, Conformational Structure and Spectroscopic Properties of trans-diazidobis(2,2-dimethyl-1,3-propanediamine)chromium(III) Perchlorate

Dohyun Moon, Jong-Ha Choi

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Mar 5;138:774-9.

PMID: 25544193

Abstract:

A new complex trans-anti-[Cr(Me2tn)2(N3)2]ClO4·2H2O, where Me2tn=2,2-dimethyl-1,3-propanediamine was synthesized and characterized, and its molecular structure was established by single-crystal X-ray diffraction at 95K. The complex crystallized in the space group C2/c of the monoclinic system with four mononuclear formula units in a cell of dimensions a=16.600 (3), b=7.709 (2), c=16.865 (3)Å, and β=99.07 (3)°. The chromium(III) atom was in a distorted octahedral coordination with four N atoms of two chelating Me2tn ligands and two N atoms of the azido group in the trans axial position. The two six-membered rings in the complex adopted only anti chair-chair conformations with respect to each other The important bond lengths are CrN(azide) 2.007 (2), CrN(Me2tn) 2.081 (2), 2.082 (2), NN(azide) 1.184 (2) and 1.156 (2)Å, respectively. The crystal lattice is stabilized by hydrogen bonding interactions among the ClO4(-), hydrate molecule, N3(-), and NH groups of the Me2tn ligand. The ligand field analysis as well as the IR and electronic spectral properties were described.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP81190252	7-Diethylamino-2-(7-diethylamino-2-oxochroman-3-yl)chromylium perchlorate		81190-25-2	Price

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