Through the reaction of 4-hydroxybenzohydrazide with rac-3-methylcycplopentanone and R-(+)-3- methylcyclopentanone, racemic and enantiomorphic imines were obtained and characterized in the solid state. The racemic imine crystallizes either in the orthorhombic polar space group Pna21, and the crystal structure is polar and completely analogous to the structure of similar non-chiral imines we have recently studied, or in the monoclinic centrosymmetric space group P21/n. The enantiomorphic imine crystallizes in the monoclinic polar space group P21, but the crystal structure is actually non-polar and shows significant pseudo-centrosymmetry being quasi-isomorphous with the centrosymmetric structure of the racemic imine. The density of the enantiomorphic pseudocentric crystals is significantly higher than the polar orthorhombic racemic crystals and almost equal to the centrosymmetric racemic crystals

Polar crystals in imines of 4-hydroxybenzohydrazide: a comparison between racemic and enantiomorphic crystals

CAPOBIANCO, AMEDEO;PELUSO, Andrea
2013-01-01

Abstract

Through the reaction of 4-hydroxybenzohydrazide with rac-3-methylcycplopentanone and R-(+)-3- methylcyclopentanone, racemic and enantiomorphic imines were obtained and characterized in the solid state. The racemic imine crystallizes either in the orthorhombic polar space group Pna21, and the crystal structure is polar and completely analogous to the structure of similar non-chiral imines we have recently studied, or in the monoclinic centrosymmetric space group P21/n. The enantiomorphic imine crystallizes in the monoclinic polar space group P21, but the crystal structure is actually non-polar and shows significant pseudo-centrosymmetry being quasi-isomorphous with the centrosymmetric structure of the racemic imine. The density of the enantiomorphic pseudocentric crystals is significantly higher than the polar orthorhombic racemic crystals and almost equal to the centrosymmetric racemic crystals
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4110853
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 14
social impact