²é¿´: 1095  |  »Ø¸´: 3
±¾Ìû²úÉú 1 ¸ö ·­ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴

ÀËÇéÎÞÇé

Òø³æ (ÕýʽдÊÖ)

[ÇóÖú] Èý¸öÓлú»¯ºÏÎïºìÍâ¹âÆ×ÊõÓӢÒ뺺£©

Involves semi-circle stretch£¨Éæ¼°±½»·µÄ½á¹¹£©£»
Quadrant stretch£¨Éæ¼°à­ßøµÄ½á¹¹£©£»
Ring stretch£¨Éæ¼°±½»·µÄ½á¹¹£©
лл´óϺÃÇ£¡

» ²ÂÄãϲ»¶

ÖûסСľ³æ£¬¸¯ÆäÈ⣬ÐàÆä¹Ç£¡
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zerohead

½û³æ (Ö°Òµ×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï
°®ÓëÓêÏÂ(½ð±Ò+1): ~£¡ 2011-08-31 20:57:41
ÀËÇéÎÞÇé(½ð±Ò+10): 2011-09-01 08:27:58
Involves semi-circle stretch Éæ¼°µ½µÄ°üÀ¨£º°ë»·À­Éì¡¢
Quadrant stretch ÏóÏÞÀ­Éì¡¢
Ring stretch ÒÔ¼°È«»·À­Éì
2Â¥2011-08-31 13:04:45
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

bzyd

½ð³æ (СÓÐÃûÆø)

̫רҵÁË
ÒòΪÓÐÁËÒòΪËùÒÔÓÐÁËËùÒÔ¼ÈÈ»ÒѳɼÈÈ»ºÎ±ØÔÙ˵ºÎ±Ø
3Â¥2011-08-31 13:11:12
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

jwdxbjzh

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï
sltmac(½ð±Ò+1): ¸Ðл½»Á÷~~ 2011-09-01 08:05:15
ÀËÇéÎÞÇé(½ð±Ò+5, ·­ÒëEPI+1): 2011-09-01 08:27:49
ÒýÓûØÌû:
1Â¥: Originally posted by ÀËÇéÎÞÇé at 2011-08-31 10:44:25:
Involves semi-circle stretch£¨Éæ¼°±½»·µÄ½á¹¹£©£»
Quadrant stretch£¨Éæ¼°à­ßøµÄ½á¹¹£©£»
Ring stretch£¨Éæ¼°±½»·µÄ½á¹¹£©
лл´óϺÃÇ£¡

Involves semi-circle stretch Éæ¼°µ½°ë»·ÉìËõ
Quadrant stretch ËÄ·Ö»·ÉìËõ
Ring stretch »·ÉìËõ
For example:
It has been described that the ring stretches for aromatic and
heteroaromatic rings can be divided into two different modes,
the quadrant stretch and the semicircle stretch, as illustrated in
Figure 2.
£¨¼û¸½¼þÎĵµÖиßÁÁµÄFigure 2):
https://good.gd/1559750.htm
jwd
4Â¥2011-09-01 07:59:08
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ ÀËÇéÎÞÇé µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 268Çóµ÷¼Á +7 ¼òµ¥µã0 2026-03-17 7/350 2026-03-21 08:32 by JourneyLucky
[¿¼ÑÐ] 302Çóµ÷¼Á +11 ºôºôºô¡£¡£¡£¡£ 2026-03-17 11/550 2026-03-21 08:29 by JourneyLucky
[¿¼ÑÐ] һ־Ըɽ´ó07»¯Ñ§ 332·Ö ËÄÁù¼¶Òѹý ±¾¿ÆÉ½¶«Ë«·Ç Çóµ÷¼Á£¡ +3 ²»ÏëÀíÄã 2026-03-16 3/150 2026-03-21 03:59 by JourneyLucky
[¿¼ÑÐ] 317Çóµ÷¼Á +8 Éê×ÓÉêÉê 2026-03-19 13/650 2026-03-21 00:09 by Áõ¹úÉ­
[¿¼ÑÐ] 324Çóµ÷¼Á +5 luckyѽѽѽѼ 2026-03-20 5/250 2026-03-20 22:30 by ´ÙÌì³É
[¿¼ÑÐ] 329Çóµ÷¼Á +9 ÏëÉÏѧ߹߹ 2026-03-19 9/450 2026-03-20 22:01 by luoyongfeng
[¿¼ÑÐ] Ò»Ö¾Ô¸Î÷ÄϽ»Í¨ ר˶ ²ÄÁÏ355 ±¾¿ÆË«·Ç Çóµ÷¼Á +5 Î÷ÄϽ»Í¨×¨²Ä355 2026-03-19 5/250 2026-03-20 21:10 by JourneyLucky
[¿¼ÑÐ] 353Çóµ÷¼Á +3 À­¹³²»Ðí±ä 2026-03-20 3/150 2026-03-20 19:56 by JourneyLucky
[¿¼ÑÐ] Çóµ÷¼Á +3 eation27 2026-03-20 3/150 2026-03-20 19:32 by JourneyLucky
[¿¼ÑÐ] ÕÐÊÕµ÷¼Á˶ʿ +4 lidianxing 2026-03-19 12/600 2026-03-20 12:25 by lidianxing
[¿¼ÑÐ] 286Çóµ÷¼Á +6 lemonzzn 2026-03-16 10/500 2026-03-19 14:31 by lemonzzn
[¿¼ÑÐ] ²ÄÁÏ¿¼Ñе÷¼Á +3 xwt¡£ 2026-03-19 3/150 2026-03-19 11:22 by wãåÑôw
[¿¼ÑÐ] 328Çóµ÷¼Á£¬Ó¢ÓïÁù¼¶551£¬ÓпÆÑо­Àú +4 ÉúÎ﹤³Ìµ÷¼Á 2026-03-16 12/600 2026-03-19 11:10 by ÉúÎ﹤³Ìµ÷¼Á
[¿¼ÑÐ] 344Çóµ÷¼Á +6 knight344 2026-03-16 7/350 2026-03-18 20:13 by walc
[¿¼ÑÐ] 0854¿É¿çµ÷¼Á£¬Ò»×÷Ò»ÏîºËÐÄÂÛÎÄÎåÏîרÀû£¬Ê¡¡¢¹ú¼¶Ö¤Êé40+ÊýÒ»Ó¢Ò»287 +8 СÀî0854 2026-03-16 8/400 2026-03-18 14:35 by ²«»÷518
[¿¼ÑÐ] ÉúÎïѧ071000 329·ÖÇóµ÷¼Á +3 ÎÒ°®ÉúÎïÉúÎﰮΠ2026-03-17 3/150 2026-03-18 10:12 by macy2011
[¿¼ÑÐ] ²ÄÁÏר˶326Çóµ÷¼Á +6 Ä«ìÏæ¦Ý· 2026-03-15 7/350 2026-03-17 17:10 by ruiyingmiao
[¿¼ÑÐ] Ò»Ö¾Ô¸ËÕÖÝ´óѧ²ÄÁϹ¤³Ì£¨085601£©×¨Ë¶ÓпÆÑо­ÀúÈýÏî¹ú½±Á½¸öʵÓÃÐÍרÀûÒ»ÏîÊ¡¼¶Á¢Ïî +6 ´ó»ðɽС»ðɽ 2026-03-16 8/400 2026-03-17 15:05 by ÎÞи¿É»÷111
[¿¼ÑÐ] ÖпÆÔº²ÄÁÏ273Çóµ÷¼Á +4 yzydy 2026-03-15 4/200 2026-03-16 15:59 by Gaodh_82
[¿¼ÑÐ] ±¾¿ÆÄϾ©´óѧһ־Ը´¨´óҩѧ327 +3 ÂóÌï¸ûÕß 2026-03-14 3/150 2026-03-14 20:04 by ÍâÐÇÎÄÃ÷
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û