Affiliation:
1. Department of Studies in Chemistry, Mangalore University, Mangalagangotri-574 199, Mangalore, India
2. Darmstadt University of Technology, Institute of Materials Science, Petersenstr.23, D-64287 Darmstadt, Germany
Abstract
The effect of N-chloro, side chain and sites of ring substitutions on the crystal structure of N-(trichlorophenyl)-2-chloro and 2,2,2-trichloroacetamides has been studied by determining the crystal structure of N-(2,4,5-trichlorophenyl)-2-chloroacetamide, 2,4,5-Cl3C6H2.NHCO.CH2Cl (N245TCPCA), N-chloro-N-(2,4,5-trichlorophenyl)-2-chloroacetamide, 2,4,5-Cl3C6H2.NClCO. CH2Cl (NC245TCPCA) and N-(2,4,5-trichlorophenyl)-2,2,2-trichloroacetamide, 2,4,5-Cl3C6H2. NHCO.CCl3 (N245TCPTCA). The crystal type, space group, formula units and lattice constants in Å are: N245TCPCA: monoclinic, P21/n, Z = 4, a = 4.732(1), b = 29.522(3), c = 7.734(1), β = 108.33(1)◦; NC245TCPCA: monoclinic, P21/c, Z = 4, a = 15.965(3), b = 9.398(1), c = 7.352(2), β = 91.51(2)◦; N245TCPTCA: orthorhombic, Pmc21, Z = 4, a = 6.945(1), b = 11.370(3), c = 15.555(3). The results are compared with the structure of N-(phenyl)- acetamide, N-(phenyl)-2,2,2-trichloroacetamide, N-(2-chlorophenyl)-2,2,2-trichloroacetamide, N-(4-chlorophenyl)-2,2,2-trichloroacetamide, N-(2,6-dichlorophenyl)-2,2,2-trichloroacetamide, N-(2,4,6-trichlorophenyl)-acetamide, N-(2,4,6-trichlorophenyl)-2-chloroacetamide and N-(2,4,6- trichlorophenyl)-2,2,2-trichloroacetamide. The comparison of the bond parameters reveal that there are significant changes by substitution in both the ring and side chain of the amides and by N-chlorination. But to draw general conclusions further, substantial work is needed with varying substitutions
Subject
Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics
Cited by
30 articles.
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