Znn3bq.jpeg
²é¿´: 650  |  »Ø¸´: 4
±¾Ìû²úÉú 1 ¸ö ·­ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

Red_Andy

ľ³æ (СÓÐÃûÆø)

[ÇóÖú] Ò»¾ä»°·­Òë

As we all know, formic acid has two conformers: transformic acid and cis-formic acid, namely, (T)-formic acid and (C)-formic acid; both conformers are planer. (T)-Formic acid has the acidic hydrogen aligned toward the oxygen atom of the carbonyl group, while (C)-formic acid has the hydrogen atom away from it. And (T)-formic acid is more stable than (C)-formic acid by about 4.0 kcal/mol. Our calculation of this value is in excellent agreement with this experimental number with an energy difference between the two conformations of 4.0 kcal/mol at the B3LYP/6-311++g(2d,2p)//B3LYP/6-311++g(d,p) level of theory. This corresponds to a Boltzman population ratio of about 1000 to 1 in favor of the trans conformer at room temperature.

ÇóÕâÀï×îºóÒ»¾ä»°µÄ·­ÒëThis corresponds to a Boltzman population ratio of about 1000 to 1 in favor of the trans conformer at room temperature.¡£
¡£
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hookhans

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

Farmer

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

ºÕºÕ£¬ Õâô¶àµÄר¼Ò¹ËÎʶ¼À´ÁË¡£
where-there-is-a-will-there-is-a-way.
5Â¥2013-04-01 11:13:04
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 5 ¸ö»Ø´ð

xzx8066

ľ³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

corresponds to£ºÓë¡­¡­Ïà·û£»
population£º²¼¾ÖÊý£¬Boltzman·Ö²¼ÖÐÒ»¸ö²ÎÊý£¬https://baike.baidu.com/view/6053980.htm
in favor of£ºÖ§³Ö
This£ºÖ¸ÉÏÃæ¼¸¾ä»°ÃèÊöµÄÀíÂÛºÍʵÑé½á¹û£¬¼´ÒÏËáÓÐÁ½ÖÖ¹¹Ï󣬼´trans conformer£¨T£©ºÍcis conformer£¨C£©£¬¶øÇÒT¹¹Ïó±ÈC¹¹ÏóÎȶ¨¡£
ʵ¼Ê´æÔÚµÄÏÖÏ󣺳£ÎÂÏ£¨ÊÒÎÂÏ£©£¬ÒÏËáÒÔT¹¹ÏóÐÎʽ´æÔÚµÄÊýÁ¿ÊÇC¹¹ÏóµÄ1000±¶£¬¼´±ÈֵΪ1000:1¡£

ËùÒÔÕâ¾ä»°µÄÒâÒå¾ÍÊÇ£ºÉÏÊöÀíÂÛÓëʵÑé½á¹ûÓë´æÔÚµÄÏÖÏó[³£ÎÂÏ£¨ÊÒÎÂÏ£©£¬ÒÏËáÒÔT¹¹ÏóÐÎʽ´æÔÚµÄÊýÁ¿ÊÇC¹¹ÏóµÄ1000±¶£¬¼´±ÈֵΪ1000:1]ÊÇÏà·ûºÏµÄ¡£
2Â¥2013-04-01 08:45:32
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hookhans

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

Farmer

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
Red_Andy: ½ð±Ò+15, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2013-04-01 11:58:30
This corresponds to a Boltzman population ratio of about 1000 to 1 in favor of the trans conformer at room temperature¡£

ÕâÏ൱ÓÚÒÔ1000/1µÄ²£¶û×ÈÂü·Ö²¼±ÈÀý£¬ËµÃ÷ÔÚÊÒÎÂÏÂÖ÷ÒªÊÇ·´Ê½µÄ¹¹Ïó¡£
where-there-is-a-will-there-is-a-way.
3Â¥2013-04-01 09:07:45
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

bwshanxi

ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

×ÜËùÖÜÖª£¬¼×ËáÓÐÁ½ÖÖ¹¹Ïó: Ë³ÊÆÊ½¹¹ÏóµÄËáºÍ·´Ê½¹¹ÏóµÄËᣬ¼´£º£¨T£©-¼×ËáºÍ£¨C£©-¼×Ëá¡£Á½ÖÖ¹¹Ïó¶¼ÊÇÔÚÒ»¸öÆ½ÃæÄÚ¡££¨T£©ÐÍ-¼×ËáµÄËáÐÔÇâÓëôÊ»ùµÄÑõÔ­×ÓµÄÈ¡ÏòÒ»Ö£»£¨C£©ÐÍ-¼×ËáµÄËáÐÔÇâÓëôÊ»ùµÄÑõÔ­×Ó²»Ò»Ö¡££¨C£©ÐÍ-¼×ËáÓ루T£©ÐÍ-¼×ËáÏà±È£¬£¨T£©ÐÍ-¼×Ëá¸üÎȶ¨£¬ÆäÎȶ¨ÄÜÁ¿´óÔ¼ÊÇ4.0ǧ¿¨/Ħ¶û¡£ÎÒÃǵļÆËãÖµÓëB3LYP/6-311++g(2d,2p)//B3LYP/6-311++g(d,p)µÄÀíÂÛˮƽµÄ£¨C£©ÐÍ-¼×ËáÓ루T£©ÐÍ-¼×ËáÄÜÁ¿²î·Ç³£½Ó½ü¡£Õâ¶ÔÓ¦ÓÚʧÍûÌõ¼þÏÂÂ𣬲£¶û×ÈÂü±ÈÂʵÄǧ·ÖÖ®Ò»µÄ¹¹Ïóת±ä¡£
±¾ÈËÆ·µÂºÃ,ÇڷܺÃѧ!ÇڷܳÁµíÓÅÐã,ÀíÏëÔì¾ÍÈËÉú!!
4Â¥2013-04-01 09:34:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 085600²ÄÁÏÓ뻯¹¤£¬Çóµ÷¼Á +8 won_qii 2026-04-07 8/400 2026-04-09 14:17 by Delta2012
[¿¼ÑÐ] ÉúÎïѧ308·ÖÇóµ÷¼Á£¨Ò»Ö¾Ô¸»ª¶«Ê¦´ó£© +13 ÏàÐűػá¹ââÍòÕ 2026-04-06 16/800 2026-04-09 13:54 by ÐìÁ¼°×ü´óÏÀ
[¿¼ÑÐ] 070300»¯Ñ§Ñ§Ë¶311·ÖÇóµ÷¼Á +18 Áº¸»¹óÏÕÖÐÇó 2026-04-04 20/1000 2026-04-09 11:18 by ßÕßÕßÕßÉßÉßÉ
[¿¼ÑÐ] 299Çóµ÷¼Á +5 ZVVZ13 2026-04-08 5/250 2026-04-09 10:13 by ÄæË®³Ë·ç
[¿¼ÑÐ] 0703µ÷¼Á +17 ʰ¾ÁÒ¼ 2026-04-04 19/950 2026-04-09 09:18 by may_ÐÂÓî
[¿¼ÑÐ] 085501»úеӢ¶þ77×Ü·Ö294Çóµ÷¼Á£¬½ÓÊÜ¿çרҵѧϰ +5 ÊØ·¨¹«ÃñØÁ¼Í 2026-04-08 5/250 2026-04-08 21:19 by bljnqdcc
[¿¼ÑÐ] 269Çóµ÷¼Á +6 °¡°¡ÎÒÎÒ 2026-04-07 6/300 2026-04-08 20:04 by ÎÒ¼õ·Ê1
[¿¼ÑÐ] 304Çóµ÷¼Á +10 ËØÄê¼ÀÓï 2026-04-06 17/850 2026-04-08 09:05 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 344Çóµ÷¼Á +11 κ×Óper 2026-04-07 11/550 2026-04-07 23:01 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸ÎäÀí³µÁ¾×¨Ë¶×Ü·Ö 281 Çóµ÷¼Á +4 Éϰ¶Ñо¿Éú. 2026-04-02 4/200 2026-04-07 09:52 by ¼ÓÓÍÏòδÀ´°¡
[¿¼ÑÐ] 0857´óÀà»·¾³¹¤³ÌBÇøÇóµ÷¼Á +3 ¹¨ÓíÃú 2026-04-05 3/150 2026-04-06 10:22 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 0860 Çóµ÷¼Á Ò»Ö¾Ô¸¹ú¿Æ´ó 348 ·Ö +3 WiiiP 2026-04-03 3/150 2026-04-05 17:43 by Ecowxq666£¡
[¿¼ÑÐ] Ò»Ö¾Ô¸±±½»´ó²ÄÁϹ¤³Ì×Ü·Ö358Çóµ÷¼Á +6 cs0106 2026-04-05 6/300 2026-04-05 16:34 by imissbao
[¿¼ÑÐ] 085400µç×ÓÐÅÏ¢319Çóµ÷¼Á£¨½ÓÊÜ¿çרҵµ÷¼Á£© +5 ÐÇÐDz»Õ£ÑÛà¶ 2026-04-03 6/300 2026-04-04 21:50 by hemengdong
[¿¼ÑÐ] 309Çóµ÷¼Á +6 ÁõÁõÁõ1231 2026-04-02 7/350 2026-04-04 13:41 by liucky
[¿¼ÑÐ] 357Çóµ÷¼Á +13 1050389037 2026-04-03 13/650 2026-04-03 22:27 by Î޼ʵIJÝÔ­
[¿¼ÑÐ] 283Çóµ÷¼Á +3 jiouuu 2026-04-03 4/200 2026-04-03 13:28 by jiouuu
[¿¼ÑÐ] 320Çóµ÷¼Á +3 ũҵ¹¤³ÌÓëÐÅÏ¢¼ 2026-04-03 3/150 2026-04-03 11:40 by ÍÁľ˶ʿÕÐÉú
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +4 Ò»ÑùYWY 2026-04-03 4/200 2026-04-03 09:48 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 22408 266Çóµ÷¼Á +3 masss11222 2026-04-02 3/150 2026-04-02 18:11 by ±ÊÂä½õÖÝ
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û