Hydrogen-bonding chain and dimer motifs in pyridinium and morpholinium hydrogen oxalate salts

Abstract

We present here three compounds consisting of pyridinium or morpholinium hydrogen oxalates, each displaying different hydrogen-bonding motifs, resulting in chains for 4-(dimethylamino)pyridinium hydrogen oxalate 0.22-hydrate, C7H11N2+·C2HO4−·0.22H2O (1), dimers for 4-tert-butylpyridinium hydrogen oxalate, C9H14N+·C2HO4− (2), and chains for morpholinium hydrogen oxalate, C4H10NO+·C2HO4− (3).

Keywords

• oxalate
• hydrogen bonding
• ammonium cations
• crystal structure