TY - JOUR

T1 - Glycinium semi-malonate and a glutaric acid-glycine cocrystal

T2 - New structures with short O - H⋯O hydrogen bonds

AU - Losev, Evgeniy A.

AU - Zakharov, Boris A.

AU - Drebushchak, Tatiana N.

AU - Boldyreva, Elena V.

PY - 2011/8/1

Y1 - 2011/8/1

N2 - Glycinium semi-malonate, C 2H 6NO 2 +·C 3H 3O 4 -, (I), and glutaric acid-glycine (1/1), C 2H 5NO 2·C 5H 8O 4, (II), are new examples of two-component crystal structures containing glycine and carb-oxy-lic acids. (II) is the first example of a glycine cocrystal which cannot be classified as a salt, as glutaric acid remains completely protonated. In the structure of (I), there are chains formed exclusively by glycinium cations, or exclusively by malonate anions, and these chains are linked with each other. Two types of very short O - H⋯O hydrogen bonds are present in the structure of (I), one linking glycinium cations with malonate anions, and the other linking malonate anions with each other. In contrast to (I), no direct linkages between molecules of the same type can be found in (II); all the hydrogen-bonded chains are heteromolecular, with molecules of neutral glutaric acid alternating with glycine zwitterions, linked by two types of short O - H⋯O hydrogen bonds.

AB - Glycinium semi-malonate, C 2H 6NO 2 +·C 3H 3O 4 -, (I), and glutaric acid-glycine (1/1), C 2H 5NO 2·C 5H 8O 4, (II), are new examples of two-component crystal structures containing glycine and carb-oxy-lic acids. (II) is the first example of a glycine cocrystal which cannot be classified as a salt, as glutaric acid remains completely protonated. In the structure of (I), there are chains formed exclusively by glycinium cations, or exclusively by malonate anions, and these chains are linked with each other. Two types of very short O - H⋯O hydrogen bonds are present in the structure of (I), one linking glycinium cations with malonate anions, and the other linking malonate anions with each other. In contrast to (I), no direct linkages between molecules of the same type can be found in (II); all the hydrogen-bonded chains are heteromolecular, with molecules of neutral glutaric acid alternating with glycine zwitterions, linked by two types of short O - H⋯O hydrogen bonds.

UR - http://www.scopus.com/inward/record.url?scp=80051538367&partnerID=8YFLogxK

U2 - 10.1107/S0108270111024620

DO - 10.1107/S0108270111024620

M3 - Article

C2 - 21817796

AN - SCOPUS:80051538367

VL - 67

SP - o297-o300

JO - Acta Crystallographica Section C: Crystal Structure Communications

JF - Acta Crystallographica Section C: Crystal Structure Communications

SN - 0108-2701

IS - 8

ER -