The structure of 7,14-dicarbonylethoxyacenaphth[l,2-k]-fluoranthene and its tetracyanoquinodimethane charge transfer complex |
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Authors: | Benjamin F Plummer W Gregory Reese William H Watson Mariusz Krawiec |
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Institution: | (1) Department of Chemistry, Trinity University, 78212 San Antonio, Texas;(2) Department of Chemistry, Texas Christian University, 76129 Fort Worth, Texas |
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Abstract: | A molecular mechanics simulation of the structure of 7,14-dicarbonylethoxyacenaphthl,2-k]fluoranthene,1, indicated a preferred geometry for the hindered substituents in which the carbonyl groups were constrained to an anti conformation because of the steric hindrance associated with the in-plane buttressing hydrogen atoms. X-ray crystallographic analysis of1 verifies the correctness of the computation. Compound1 and tetracyanoquinodimethane,2, form a charge transfer complex, and a crystal structure analysis shows a slightly offset, nearly parallel arrangement of the acceptor with the cloud of the donor. The interplanar distance of 3.45 Å between acceptor and donor lies within the statistical limits of the interplanar distance of complexes formed between2 and a variety of PAH donors. The steric hindrance caused by the substituents in1 appears to offer only minimal interference to the formation of the complex. |
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Keywords: | Molecular mechanics simulation crystal structure analysis charge transfer |
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