Electrostatic properties of cytosine monohydrate from diffraction data.
Electrostatic properties of cytosine monohydrate from diffraction data.
复制标题
衍射数据中胞嘧啶一水合物的静电特性。
DOI:
10.1107/s0108768190001343
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发表时间:
1990
期刊:
影响因子:
--
通讯作者:
Craven,BM
中科院分区:
文献类型:
--
作者:
Weber,HP;Craven,BM
The charge density distribution in deuterated cytosine monohydrate [4-(2H2)-amino-2 (1H)-(1-aH)-pyrimidinone], CaHaD3N30. D20, Mr= 134" 15, monoclinic, P2Jc, a= 7.714 (1), b= 9.825 (1), c= 7" 506 (2) A, fl= 100.52 (1), Z= 4, has been determined from 1432 X-ray reflections [sin8/,~< 1.15/~-l, Mo Ka, A= 0.7093 (1)/~] collected at 82 (2) K. Least-squares structure refinement assum-ing Stewart's rigid pseudoatom model gave R (F)= 0.041, with all nuclear positions and H/D anisotropic thermal parameters having fixed values previously determined by neutron diffraction. The cytosine and water molecules are both electrically neutral within