Title

The Structure of Glycine Dihydrate: Implications for the Crystallization of Glycine from Solution and Its Structure in Outer Space

Document Type

Article

Publication Date

1-1-2017

Publication Title

Angewandte Chemie - International Edition

Volume

56

Issue

8

First page number:

2030

Last page number:

2034

Abstract

Glycine, the simplest amino acid, is also the most polymorphous. Herein, we report the structure determination of a long unknown phase of glycine, which was first reported by Pyne and Suryanarayanan in 2001. To date, this phase has only been prepared at 208 K as nanocrystals within ice. Through computational crystal-structure prediction and powder X-ray diffraction methods, we identified this elusive phase as glycine dihydrate (GDH), representing the first report on the structure of a hydrated glycine structure. The structure of GDH has important implications for the state of glycine in aqueous solution and the mechanisms of glycine crystallization. GDH may also be the form of glycine that comes to Earth from extraterrestrial sources. � 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Language

english

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