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Synthesis, Crystal Structure and Spectroscopic Properties of (Acetylacetonato)(1,4,8,11‐tetraazacyclotetradecane)chromium(III) Diperchlorate
Author(s) -
Subhan Md Abdus,
Choi JongHa,
Ng Seik Weng
Publication year - 2011
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100423
Subject(s) - cyclam , chromium , ligand (biochemistry) , chemistry , octahedron , molecule , crystallography , crystal structure , diketone , stereochemistry , organic chemistry , metal , biochemistry , receptor
The complex [Cr(cyclam)(acac)](ClO 4 ) 2 · 0.5H 2 O (cyclam = 1,4,8,11‐tetraazacyclotetradecane; acac = acetylacetonate) was prepared and structurally characterized by single‐crystal X‐ray diffraction at 100 K. The chromium atom is in a slightly distorted octahedral environment with four nitrogen atoms of the macrocyclic ligand and two O ‐bonded acac molecules in cis position. The cyclam ligand adopts the folded cis ‐V configuration with six‐ and five‐membered chelate rings in chair and gauche conformation , respectively . The average Cr–N(cyclam) and Cr–O(acac) bonds are 2.080(4) and 1.941(3) Å, respectively. The IR and visible spectral properties are also described.