Research Article: 2-Amino­ethanaminium iodide

Date Published: June 01, 2012

Publisher: International Union of Crystallography

Author(s): Alan R. Kennedy, Maurice O. Okoth.


The title salt, [NH3CH2CH2NH2]+·I−, has an array structure based on strong inter­molecular N—H⋯N hydrogen bonding formed between the ammonium and amine groups of adjacent cations. This inter­action gives a helical chain of cations that runs parallel to the b axis. The four remaining NH group H atoms all form hydrogen bonds to the iodide anion, and these iodide anions lie in channels parallel to the cation–cation chains.

Partial Text

For syntheses and structures of salt forms of the related ethyl­ene-1,2-diammonium, see: Chen (2009 ▶); Saidi et al. (2011 ▶). For a structural example of a complex of ethyl­ene-1,2-diammonium, see: Zhang et al. (2006 ▶). For the synthesis that gave the title compound as a by-product, see: Kennedy et al. (2011 ▶). For C–N bond length changes in another monoprotonated symmetrical diamine, see: Craig et al. (2012 ▶).




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