On the polymorphism of benzocaine; a low-temperature structural phase transition for form (II).
Acta Crystallogr B
; 65(Pt 4): 509-15, 2009 Aug.
Article
em En
| MEDLINE
| ID: mdl-19617687
ABSTRACT
A low-temperature structural phase transition has been observed for form (II) of benzocaine (BZC). Lowering the temperature doubles the b-axis repeat and changes the space group from P2(1)2(1)2(1) to P112(1) with gamma now 99.37 degrees. The structure is twinned, the twin rule corresponding to a 2(1) screw rotation parallel to a. The phase transition is associated with a sequential displacement parallel to a of zigzag bi-layers of ribbons perpendicular to b*. No similar phase transition was observed for form (I) and this was attributed to the different packing symmetries of the two room-temperature polymorphic forms.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Benzocaína
Idioma:
En
Revista:
Acta Crystallogr B
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Austrália