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DABCO mono-betaine hydrate studied by X-ray diffraction, DFT calculations and spectroscopic methods
被引:13
|作者:
Barczynski, P.
[1
]
Dega-Szafran, Z.
[1
]
Katrusiak, A.
[1
]
Perdoch, W.
[1
]
Szafran, M.
[1
]
机构:
[1] Adam Mickiewicz Univ, Fac Chem, PL-60780 Poznan, Poland
关键词:
1,4-Diazabicyclo[2.2.2]octane;
Betaines;
O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds;
X-ray diffraction;
DFT calculations;
Spectroscopic methods;
DENSITY-FUNCTIONAL THERMOCHEMISTRY;
CRYSTAL-STRUCTURE;
CHEMICAL-SHIFTS;
TRIETHYLENEDIAMINE;
TRANSITION;
DYNAMICS;
GIAO/DFT;
AMINES;
C-13;
D O I:
10.1016/j.molstruc.2009.05.050
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A new DABCO mono-betaine (1-carboxymethyl-1,4-diazabicyclo[2.2.2]octane inner salt) has been synthesized. It crystallizes as monohydrate in orthorhombic space group Pmn2(1). The DABCO mono-betaine and water molecules are located on a mirror plane. The water molecules link DABCO mono-betaine into linear chains through the H-O-H center dot center dot center dot OOC and H-O-H center dot center dot center dot N hydrogen bonds of 2.709(2) and 2.875(2) angstrom. The structure of the title compound optimized at B3LYP/6-31G(d,p) level of theory is consistent with X-ray diffraction. The absorption bands in the FTIR spectrum have been assigned. The calculated magnetic isotropic shielding tensors confirm the assignments of the C-13 NMR resonance signals. (C) 2009 Elsevier B.V. All rights reserved.
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页码:46 / 52
页数:7
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