Persistence of layer motifs in the crystal structures of [1,4-bis-(2-methoxy-2-carbonylethyl)piperazinium (2’)] chloride and [1,4-bis-(2-amidoethyl)piperazinium (2’)] perchlorate |
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| Authors: | Octavio A C Antunes Jairo Bordinhão Nakédia M F Carvalho James L Wardell Pedro A Arroyo Márcio E Berezuk Lucio Cardozo-Filho Edward R T Tiekink |
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| Institution: | (1) Departamento de Química Inorganica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68563, 21945-970 Rio de Janeiro, RJ, Brazil;(2) Departamento de Engenharia Química, Universidade Estadual de Maringá, Av., Colombo 5790, Bloco D-90, Maringá-PR, 87020-900, Brazil;(3) Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA |
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| Abstract: | Two structures of the closely related piperazinium salts, 1,4-bis-(2-methoxy-2-carbonylethyl)piperazinium (2+)] chloride
(1) and 1,4-bis-(2-amidoethyl)piperazinium (2+)] perchlorate (2) reveal the persistence of a layer structure, interspersed with anions, held in place by N–H···Cl, C–H···O and C–H···Cl interactions
in the case of 1, and N–H···O and C–H···O interactions in the case of 2. Compound 1 crystallizes in the triclinic space group P-1 with a=6.7667(6) ?, b = 6.9467(6) ?, c=9.3880(18) ?, α=105.845(9)°, β=99.896(16)°, γ=103.600(9)°, and Z=1. Compound 2 crystallizes in the monoclinic space group P21/c with a = 9.0930(8) ?, b=10.0525(11) ? c=10.2104(13) ?, β=114.279(9)°, and Z=2. |
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| Keywords: | Piperazinium salts hydrogen-bonding amide Ester |
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