| ²é¿´: 335 | »Ø¸´: 0 | |||
[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˼£¿£© »¹ÓÐÈËÕâÑùдµÄ£º 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) |
» ²ÂÄãϲ»¶
¡¾2026 ¿¼Ñе÷¼Á¡¿¹þ¶û±õ¹¤³Ì´óѧºË¿ÆÑ§Óë¼¼ÊõѧԺºË»¯¹¤Ïµ ÕÐÊÕµ÷¼ÁÉú
ÒѾÓÐ1È˻ظ´
¹ãÖÝ´óѧ»·¾³´ó·Ö×Ó²ÄÁÏÑо¿Ëù2026ÄêÑо¿ÉúÕÐÉú¼òÕÂ
ÒѾÓÐ0È˻ظ´
ÎÞ»ú»¯Ñ§ÂÛÎÄÈóÉ«/·ÒëÔõôÊÕ·Ñ?
ÒѾÓÐ157È˻ظ´
Î人·ÄÖ¯´óѧ¼¼ÊõÑо¿ÔºÕÐÊÕ»¯Ñ§¡¢ÉúÎï¡¢²ÄÁÏ¡¢·ÄÖ¯¡¢»úеµÈרҵµ÷¼ÁÉú
ÒѾÓÐ0È˻ظ´
̨ÖÝѧԺÓÐÐò¶à¿×²ÄÁÏÍŶӻ¯Ñ§¡¢²ÄÁÏÓ뻯¹¤Ë¶Ê¿ÕÐÉú£¬ÇëËÙÁªÏµ£¡
ÒѾÓÐ0È˻ظ´
Ê×¶¼Ê¦·¶´óѧ»¯Ñ§ÏµÌïÑó¿ÎÌâ×éר˶Õе÷¼ÁÉú
ÒѾÓÐ10È˻ظ´
¹ãÖÝ´óѧ´óÍåÇø»·¾³Ñо¿Ôº»·¾³´ó·Ö×Ó²ÄÁÏÑо¿ËùÍõƽɽ½ÌÊÚÍÅ¶Ó 2026ÄêÑо¿ÉúÕÐÉú¼òÕÂ
ÒѾÓÐ0È˻ظ´
¹ãÖÝ´óѧ´óÍåÇø»·¾³Ñо¿Ôº»·¾³´ó·Ö×Ó²ÄÁÏÑо¿ËùÍõƽɽ½ÌÊÚÍÅ¶Ó 2026ÄêÑо¿ÉúÕÐÉú¼òÕÂ
ÒѾÓÐ0È˻ظ´
Ìì½òÀí¹¤´óѧ
ÒѾÓÐ0È˻ظ´
» ÇÀ½ð±ÒÀ²£¡»ØÌû¾Í¿ÉÒԵõ½:
ÑÓ°²´óѧ»¯Ñ§Ó뻯¹¤Ñ§Ôº½ÓÊÕ»¯Ñ§×¨Òµµ÷¼ÁÉú£¨¹¤¿Æ¡¢Àíѧ¾ù¿Éµ÷¼Á£©
+5/140
ÖØÇ칤ÉÌ´óѧ·ÏÓÍ×ÊÔ´»¯¼¼ÊõÓë×°±¸½ÌÓý²¿Ñо¿ÖÐÐÄ³ÏÆ¸ÄÜÔ´»¯¹¤¡¢ÉúÎﺽúת»¯·½Ïò½Ìʦ
+1/86
Æë³¹¤Òµ´óѧÕÐÊÕÇṤ¡¢²ÄÁÏ¡¢»¯¹¤¡¢»·¾³ÀàÑо¿Éú
+1/82
ºþ±±´óѧÉú¿ÆÔºÐÏÇíÀÏʦ¿ÎÌâ×éÕÐ˶ʿ/²©Ê¿,Ŀǰ»¹Óе÷¼ÁÃû¶î£¡
+1/42
½ËտƼ¼´óѧ²ÄÁÏѧԺ³ÏÕе÷¼ÁÉú
+1/40
ÕÐ˶ʿÑо¿Éú£¡ÕÐ˶ʿÑо¿Éú£¡ÕÐ˶ʿÑо¿Éú£¡ÕÐÉúרҵ£º»¯Ñ§
+1/13
±±¾©Ê¯ÓÍ»¯¹¤Ñ§ÔºÌìÈ»¸ß·Ö×ÓÓëÉúÎï²ÄÁÏ×éÕÐÊÕ0817»¯Ñ§¹¤³ÌÓë¼¼Êõ¼°0856²ÄÁÏÓ뻯¹¤µ÷¼Á
+1/11
ʡ˫һÁ÷ÖØµãѧ¿Æ£¬¹ú¼ÒÒ»Á÷רҵ£¬ÇṤ¼¼ÊõÓ빤³Ì£¬ÉúÎïÖÊÄÜÔ´Óë²ÄÁÏ
+1/10
[º¼Öݵç×ӿƼ¼´óѧ]²ÄÁÏѧԺµç³Ø¿ÎÌâ×é-2026Äê˶ʿÑо¿Éúµ÷¼ÁÐÅÏ¢
+1/8
26ÄêÉ격×Ô¼ö-¼ÆËã»úÊÓ¾õ
+1/6
»¶Óµ÷¼ÁÅÊÖ¦»¨Ñ§Ôº»¯Ñ§¹¤³Ìרҵ£¬×ÊÔ´Óë»·¾³×¨Òµ£¬ÏßÉϸ´ÊÔ
+1/6
¹úÍâú²ãÆøÑùÆ·»òÕßú̿ÑùÆ·ÇóÖú
+1/5
±±¾©·þװѧԺ ²ÄÁÏÉè¼ÆÓ빤³ÌѧԺ ·ÄÖ¯»¯Ñ§ÓëȾÕû¹¤³Ì½ÓÊÕ˶ʿÑо¿Éúµ÷¼Á2026
+1/5
ÑĮ̀´óѧ¾«×¼²ÄÁϸߵÈÑо¿Ôº26Äê²ÄÁÏ·½ÏòÑо¿ÉúÕÐÉú
+1/5
½ÜÇà/³¤½ÍŶÓÕÐÊÕ˶ʿµ÷¼Á
+1/5
ÕÐÆ¸¶þά°ëµ¼Ìå²ÄÁÏ·½Ïò²©Ê¿ºó¡¢ÁªºÏÅàÑø²©Ê¿Éú¡¢Ë¶Ê¿Éú
+1/5
Î÷ÄÏʯÓÍ´óѧÕÐÊÕ2026Äê¡°ÉêÇë-¿¼ºË¡°²©Ê¿Ñо¿Éú ·½Ïò£º²»¶Ô³Æ´ß»¯Ç⻯
+1/4
ÆëÆë¹þ¶û´óѧÀîÀò¿ÎÌâ×é³ÏÕÐ2026¼¶¿¼Ñе÷¼ÁÉú£¨Ñ§Ë¶ºÍר˶£©
+1/4
ɽ¶«Å©Òµ´óѧ»¯Ñ§Óë²ÄÁÏ¿ÆÑ§Ñ§Ôº2026ÄêÕÐÊÕµ÷¼Á˶ʿÑо¿Éú
+1/2
CD3¿¹ÌåÈçºÎ³ÉΪ˫¿¹Ò©ÎïµÄºËÐİе㣿
+1/1














»Ø¸´´ËÂ¥