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[½»Á÷] ¡¾ÇóÖú¡¿[10½ð±ÒÇó½Ì]·¢¾§Ìåѧ±¨Cʱ£¬commentµ¹ÊýµÚ¶þ¶Î£¬ÇâµÄλÖøÃÔõôÃèÊö

ÔÚѧУµÄ·ÖÎö²âÊÔÖÐÐÄ×öµÄ¾§ÌåÑÜÉ䣬ûÓÐ˵Ã÷¸ÃÔõôÑùÃèÊöÇâµÄλÖ᣿´µ½ÓÐÎÄÏ×ÕâÑùд, µ«ÊDz»¶®Ê²Ã´Òâ˼£¬Çë¸ßÊÖ°ïæ½âÊÍһϡ£All of H atoms were found in a different Fourier synthesis. In order to maximize the data/parameter ratio, H atoms bound to C atoms were placed in geometrically idealized positions (C¡ªH = 0.93¨C0.98 Å and N-H = 0.86 Å AFIX 43) and constrained to ride on their parent atoms, with Uiso (H) values of 1.2Ueq(C, N). The OH groups were refined as rigid groups allowed to rotate but not tip (AFIX 147), with O¡ªH distances of 0.82 Å and Uiso (H) values of 1.5Ueq(O).£¨Õâ¶Î»°ÊDz»ÊÇͨÓõģ¿Uiso (H) values of 1.2Ueq(C, N). Uiso (H) values of 1.5Ueq(O).·Ö±ðÊÇʲôÒâ˼£¿AFIX 43ºÍAFIX 147ÓÖÊÇʲôÒâ˼£¿£©


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In the absence of suitable anomalous scattering, Friedel equivalents
could not be used to determine the absolute structure. Refinement
of the Flack (1983) parameter led to an inconclusive value
[0.4 (6)]. Therefore, 1693 Friedel equivalents were merged before the
final refinement and the known configuration of the parent molecule
was used to define the enantiomer of the final model. (Õâ¶ÎÊÇʲôÒâ˼? ΪʲôÓеÄÎÄÕÂдÕâÒ»¶Î£¬ÓеIJ»Ð´£¿ ÕâÀïÃæ¶ÔÓ¦Êý×ÖÔÚÄĸöÎļþÖпÉÒÔÕÒµ½)

All H atoms were found in a difference Fourier synthesis. The OH groups were
refined as rigid groups allowed to rotate but not to tilt, with O¡ªH =
0.82 A ¡ã and Uiso(H) = 1.5Ueq(O). The remaining H atoms were placed
in geometrically idealized positions, with C¡ªH = 0.93¨C0.98 A ¡ã and
N¡ªH = 0.86 A ¡ã , and constrained to ride on their parent atoms, with
Uiso(H) = 1.2Ueq(C,N)
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