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       In both structures, the hydrogen atoms are refined as riding models. When determining the structures of organic molecules hydrogen atoms on heteroatoms that serve as hydrogen bond donors are typically located from residual electron density and freely refined. This is particularly necessary in a structure determination such as this where the positions of the hydrogen atoms are of supreme importance to the overall research. By refining these hydrogen atoms as riding models, the authors deprive themselves of very important information regarding the nature of these hydrogen bonding interactions. By not freely refining these hydrogen atoms, it is impossible to judge any claims about the effect of polarization on them. ¿ÉÊÇQ·å¼ÓÇâÎÒŪ²»ºÃ£¬Âé·³¸÷λ´óÏÀÁË£¡
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3Â¥: Originally posted by tyxcn at 2014-09-24 19:13:30
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2Â¥: Originally posted by lich666 at 2014-09-24 18:09:16
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