Ge Jia-Zhen, Zhao Min-Min, Shi Ping-Ping
Ordered Matter Science Research Center, College of Chemistry and Chemical, Engineering, Southeast University, Nanjing 211189, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2010 Jun 23;66(Pt 7):o1740. doi: 10.1107/S1600536810023421.
The reaction of dimethyl-amine, 18-crown-6, and perchloric acid in methanol yields the title compound, C(2)H(8)N(+)·ClO(4) (-)·C(12)H(24)O(6)·H(2)O. The dimethyl-ammonium cation and the water mol-ecule inter-act with the 18-crown-6 unit: N-H⋯O hydrogen bonds are formed between the ammonium NH(2) (+) group and four O atoms of the crown ether, while the water mol-ecule on the other side of 18-crown-6 ring forms O-H⋯O hydrogen bonds with two other O atoms of the crown ether. All conventional donors and acceptors in the cations are thus engaged in hydrogen bonding. The ClO(4) (-) anion is disordered over two sites, and occupancies for the disordered O atoms were fixed at 0.5. In the crystal, the cations and anions are arranged in alternating layers.
二甲胺、18-冠-6与高氯酸在甲醇中反应生成标题化合物C(2)H(8)N(+)·ClO(4) (-)·C(12)H(24)O(6)·H(2)O。二甲铵阳离子和水分子与18-冠-6单元相互作用：铵基NH(2) (+)基团与冠醚的四个O原子之间形成N-H⋯O氢键，而在18-冠-6环另一侧的水分子与冠醚的另外两个O原子形成O-H⋯O氢键。阳离子中的所有常规供体和受体都参与了氢键形成。ClO(4) (-)阴离子在两个位置上无序，无序O原子的占有率固定为0.5。在晶体中，阳离子和阴离子交替排列成层。
