Complexes of azobisindoles with π-organic acceptors

Autor: Marco Iacussi, Giorgio Tosi, A. Cantoni, Gabriele Bocelli, Elisabetta Giorgini, Eziana Maurelli, Paolo Bruni
Rok vydání: 1995
Předmět:
Zdroj: Journal of Chemical Crystallography. 25:683-691
ISSN: 1572-8854
1074-1542
DOI: 10.1007/bf01665976
Popis: Complexes of azobisindoles with tetracyanoethylene and tetracyanoquinodimethane were studied by UV-Vis, FT-IR, Raman, NMR and X-ray spectroscopies. FT-IR and Raman spectra, as well as X-ray analysis, gave useful information on the participation of various sites to the association, through analysis of CN and N=N vibrational modes, while UV-Vis and NMR spectra were less helpful. The crystal structure of complexes 1-ethyl-2-phenyl-3-(1-ethyl-2-phenyl-3-azoindole)indole/TCNE,3a and 1,2-diphenyl-3-(1,2-diphenyl-3-azoindole)indole/TCNQ,5b are reported. In the two complexes, the distances between donor and acceptor planes range between 3.4 and 3.5 A; in3a tetracyanoethylene faces the phenyl ring of the indole, while in5b the superposition of tetracyanoquinodimethane with the donor is negligible. Compound3a,P−1,a=9.504(2),b=9.513(3),c=8.941(2) A, α=97.81(4), β=103.38(3), γ=84.14(2)°,Z=2,Dcalc=2.55 g cm−3; compound5b,P−1,a=12.648(3),b=12.205(2),c=7.263(3) A, α=103.69(2), β=91.23(3), γ=110.61(2)°,Z=2,Dcalc=2.53 g cm−3.
Databáze: OpenAIRE
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