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Synthesis, Characterization, and Crystal Structures of [Cu(ca 2 en) 2 ]ClO 4 , and [Cu(ca 2 en)(PPh 3 ) 2 ]ClO 4 Complexes
Author(s) -
Meghdadi Soraia,
Amirnasr Mehdi,
Schenk Kurt J.,
Dehghanpour Saeed
Publication year - 2002
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/1522-2675(200209)85:9<2807::aid-hlca2807>3.0.co;2-9
Subject(s) - chemistry , triclinic crystal system , crystallography , orthorhombic crystal system , cyclic voltammetry , crystal structure , stereochemistry , group (periodic table) , center (category theory) , electrochemistry , organic chemistry , electrode
Synthesis, spectroscopy, and crystal structures of [Cu(ca 2 en) 2 ]ClO 4 ( 1 ) and [Cu(ca 2 en)(PPh 3 ) 2 ]ClO 4 ( 2 ) (ca 2 en= N , N ′‐bis( trans ‐cinnamaldehyde)ethylenediimine) are reported. Compound 1 crystallizes in the orthorhombic space group Pbca , with a =12.5647(7), b =21.8203(11), c =27.992(2) Å, V =7674.3(7) Å 3 , Z =8. Compound 2 crystallizes in the triclinic space group P $\bar 1$ , with a =13.0540(11), b =14.2935(13), c =14.9863(13) Å, α =84.130(2), β =69.761(2), γ =87.749(2)°, V =2609.8(4) Å 3 , Z =2. The coordination polyhedron about the Cu I center in the two complexes is best described as a distorted tetrahedron. The 1 H‐NMR and electronic spectra of these complexes are also reported and discussed. The cyclic voltammetry of the complexes indicate a quasireversible redox behavior for complex 1 ( E 1/2 =0.51 V). However, complex 2 displays an irreversible oxidation wave at 0.91 V. A weak emission is observed for complex 2 in CHCl 3 at room temperature.