A low-temperature phase of 2-pyrrolidone

被引：22

作者：

Goddard, R

Heinemann, O

Kruger, C

Magdo, I

Mark, F

Schaffner, K

机构：

[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany

[2] Max Planck Inst Strahlenchem, D-45470 Mulheim, Germany

来源：

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS | 1998年 / 54卷

关键词：

D O I：

10.1107/S010827019701651X

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Differential scanning calorimetry in the range 173-303 K reveals the presence of a previously unknown metastable phase of 2-pyrrolidone, C4H7NO, with a melting point of 286 K. Its crystal structure at 173 K is described. The molecules crystallize as centrosymmetric dimers and are linked by N-H...O hydrogen bonds with each molecule adopting an unstrained envelope conformation. Theoretical calculations confirm a slight pyramidalization of the N atom.

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页码：501 / 504

页数：4

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