Diethylamiium 3,5-dinitrosalicylate at 130 K

Abstract

The low-temperature (130 K) crystal structure of the 1:1 proton-transfer compound of 3,5-dinitrosalicylic acid (DNSA) with diethylamine, viz. diethylaminium 3,5-dinitrosalicylate, C4H12N +·C7H3N2O7-, shows the presence of conformationally extended diethylaminium cations in which both H atoms of the aminium centres participate in three-centre hydrogen-bonding associations [one R12(4) and the other R12(6)] with carboxyl, phenol and nitro O-atom acceptors of two separate DNSA anion species [N⋯O = 2.813 (3)-3.320 (3) Å]. These result in 12-membered cyclic R64(12) associations linking the two sets of hetero-species into discrete centrosymmetric tetramers which have no significant peripheral exten..