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Guanidinium pyromellitate

✍ Scribed by Sun, Yan-Qiong ;Zhang, Jie ;Yang, Guo-Yu

Publisher: International Union of Crystallography
Year: 2002
Tongue: English
Weight: 136 KB
Volume: 58
Category: Article
ISSN: 1600-5368
DOI: 10.1107/s1600536802012898

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The crystal structure of guanidinium pyr

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## Abstract The preparation of guanidinium and substituted guanidinium salts is described. The method consists of boiling, in a suitable solvent, the corresponding alkali metal salt and an inorganic guanidinium salt, e.g., the hydrochloride or sulphate.

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Guanidinium hydrogen selenate, CH 7 N 3 O 4 Se or [C(NH 2 ) 3 ] + Á-(HSeO 4 ) À , is isotypic with its sulfate analogue. The atomic arrangement is characterized by hydrogen selenate tetrahedra and trigonal guanidinium groups, which are connected to each other by a network of mostly weak hydrogen bon

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ÁCl À , is a phase-transfer catalyst. The geometry at the central C atom of the guanidinium cation, which lies on a twofold rotation axis, is almost ideal trigonal planar, with N-C-N angles of 119.8 (2) and 120.08 (11) . The chloride anion also lies on a twofold rotation axis.