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The Two Fundamental H-Bond Types in Acid Salts Displayed in the Dimorphs of Potassium Hydrogen Tartronate

Jan Kroon ; Laboratorium voor Structuurchemie, Rijksuniversiteit, Padualaan 8, Utrecht, The Netherlands
Jan A. Kanters ; Laboratorium voor Structuurchemie, Rijksuniversiteit, Padualaan 8, Utrecht, The Netherlands

Sažetak

At ambient temperature the acid potassium salt of tartronic
acid crystallizes in two forms. The a. form is monoclinic, space
group P21/n with a= 7.356, b = 8.116, c = 9.197 A, fJ = 94.81° and
Z = 4. The fJ form is also monclinic, space group P21/c with.
a= 6.532, b = 9.248, c = 9.505, fJ = 99.74° and Z = 4. The a. and ~
structures were solved by Patterson and Fourier methods and
refined to R = 0.047 with 1129 and 1204 observed diffractometer
data respectively. The fundamental differences in structural aspects
between the dimorphs of this acid salt are found in the H-bond
schemes. In the a. form the carboxyl groups are coupled by A-type
H bonds, in the ~ form by H bonds of the B type.

Ključne riječi

Hrčak ID:

194282

URI

https://hrcak.srce.hr/194282

Datum izdavanja:

1.7.1982.

Posjeta: 756 *