Transition from a charge-opposed (+)N-H-N(+) inter-cation hydrogen bonded form of the salt [HN(CH2CH2)3N][OOC(HC=CH) COOH] to the more traditional charge-assisted (+)N-H-O(-) cation-anion hydrogen bonded pseudo-polymorph upon hydration

被引：21

作者：

Braga, D ^{[1
]}

Rubini, K ^{[1
]}

Maini, L ^{[1
]}

机构：

[1] Dipartimento Chim G Ciamician, I-40126 Bologna, Italy

来源：

CRYSTENGCOMM | 2004年 / 6卷

关键词：

D O I：

10.1039/b409904b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reaction of [N(CH2CH2)(3)N] with maleic acid [HOOC(HC=CH) COOH] yields the anhydrous salt [HN(CH2CH2)(3)N][OOC(HC=CH) COOH] which contains chains of ((+)) N-H-N(+) bonded cations [HN(CH2CH2)(3)N](+) and isolated [OOC(HC=CH) COOH](-) anions. Upon exposure to humidity the anhydrous salt converts within few hours into the hydrated pseudo-polymorphic form [HN(CH2CH2)(3)N] [OOC(HC=CH) COOH].(H2O)(0.25), which contains more conventional "charge-assisted'' N(+)-H-O(-) hydrogen bonds between anion and cation. This latter form can also be obtained by co-grinding.

引用

页码：236 / 238

页数：3

共 28 条

[1]

BERNSTEIN J, 2002, POLYM MOL CRYSTALS

[2]

Blagden N, 1999, CHEM BRIT, V35, P44

[3] Salts of maleic and fumaric acids with organic polyamines: comparison of isomeric acids as building blocks in supramolecular chemistry [J].