±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 565  |  »Ø¸´: 1
±¾Ìû²úÉú 1 ¸ö ·­ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴

monanfang04

Ìú³æ (³õÈëÎÄ̳)

[ÇóÖú] ÎÄÏ×Ó¢Ò뺺 ¼± Çó°ï棡

Many transition metal complexes reactwith carbon dioxide.Carbon dioxide is activated by transition metals and forms complexes having bent bond structures and longer bond lengths, e.g. in Ni(CO2)(P(C6H11)3)2Ph-CH3: C¨CO¨CC bond angle is changed from 1808 to 1338 and C¨CO bond lengths is changed from1.16 to 1.22 A ¡ã and 1.17 A ¡ã as shown in Fig. 3 [8]. On the other hand, carbon¨Ccarbon unsaturated compounds such as monoolefins, dienes, allenes and acetylenes react also with transition metal complexes to form their metal pcomplexes. Both carbon dioxide and these carbon¨Ccarbon unsaturated compounds bond with the same transition metal
and they are activated. Therefore, carbon dioxide is able to react with the carbon¨C
carbon unsaturated compounds such as alkynes, conjugated dienes and allenes in the presence of transition metal compounds as the catalysts to yield six-membered unsaturated lactones (Eqs. (24)¨C(26)) or five-membered metalalactone
(Eq. (27)) [143¨C145]
     In the cyclic addition of diynes (RCBBC¨C(CH2)m-CBBCR) with carbon dioxide in the presence of a zero valent nickel catalyst, the reaction with m = 3 or 4, easily proceeds to give two cyclic 2-pyrones in about 50¨C90% yields as shown in Eq. (28). However, the reaction with m  2 and m  6, the alternating copolymerization of the diynes and carbon dioxide proceeds to give a poly(2-pyrone) by an intermolecular cycloaddition, since the intramolecular cycloaddition reaction
is difficult as shown in Eqs. (29) and (30) [150a,150b]. The reactions of these diynes and carbon dioxide in the presence of metal compounds gave the various kinds of polymeric compounds, e.g., an alternating copolymer as shown in
Eq. (31) [145,150c,150d]
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

huangzx1314

½û³æ (ÖªÃû×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
monanfang04: ½ð±Ò+45, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2013-04-29 19:08:00
Many transition metal complexes react with carbon dioxide. Carbon dioxide is activated by transition metals and forms complexes having bent bond structures and longer bond lengths, e.g. in Ni(CO2)(P(C6H11)3)2Ph-CH3: C¨CO¨CC bond angle is changed from 1808 to 1338 and C¨CO bond lengths is changed from1.16 to 1.22 A ¡ã and 1.17 A ¡ã as shown in Fig. 3 [8]. On the other hand, carbon¨Ccarbon unsaturated compounds such as monoolefins, dienes, allenes and acetylenes react also with transition metal complexes to form their metal pcomplexes.

ºÜ¶à¹ý¶É½ðÊôÅäºÏÎï¿ÉÒÔÓë¶þÑõ»¯Ì¼·´Ó¦¡£¹ý¶É½ðÊô»î»¯¶þÑõ»¯Ì¼ÒÔºóÐγɵÄÅäºÏÎï¾ßÓÐÍäÇú¼ü£¬¼ü³¤½Ï³¤£¬±ÈÈ磺Ni(CO2)(P(C6H11)3)2Ph-CH3ÅäºÏÎïÖÐC¨CO¨CC¼ü½ÇÓÉ180¡ã±äΪ133¡ã£¬²¢ÇÒ̼Ñõ¼ü³¤ÓÉ1.16 A¡ã£¨0.1nm£©±äΪ1.22ºÍ1.17 A¡ã£¬¼ûͼ3[8]¡£ÁíÒ»·½Ã棬̼̼²»±¥ºÍ»¯ºÏÎ±ÈÈ磺µ¥Ï©Ìþ¡¢¶þÏ©Ìþ¡¢±û¶þÏ©ºÍÒÒȲҲ¿ÉÒÔÓë¹ý¶É½ðÊôÅäºÏÎï·´Ó¦ÐγɶÔÓ¦½ðÊôµÄÅäºÏÌ壨pcomplexes£©¡£

Both carbon dioxide and these carbon¨Ccarbon unsaturated compounds bond with the same transition metal and they are activated. Therefore, carbon dioxide is able to react with the carbon¨Ccarbon unsaturated compounds such as alkynes, conjugated dienes and allenes in the presence of transition metal compounds as the catalysts to yield six-membered unsaturated lactones (Eqs. (24)¨C(26)) or five-membered metalalactone
(Eq. (27)) [143¨C145].

ÔÚ¹ý¶É½ðÊô´æÔÚµÄÌõ¼þÏ£¬¶þÑõ»¯Ì¼ºÍÕâЩ̼̼²»±¥ºÍ»¯ºÏÎïµÄ¼ü¶¼»á±»»î»¯¡£Îª´Ë£¬ÔÚ¹ý¶É½ðÊô»¯ºÏÎï×÷Ϊ´ß»¯¼Á´æÔÚµÄÌõ¼þÏ£¬¶þÑõ»¯Ì¼¿ÉÒÔÓë̼̼²»±¥ºÍ»¯ºÏÎï·´Ó¦£¬±ÈÈ磺ȲÌþ,¹²éî¶þÏ©ÌþºÍ±û¶þÏ©£¬»á²úÉúÁùÔª²»±¥ºÍÄÚõ¥£¨Eqs. (24)¨C(26)£©»òÕßÎåÔª½ðÊô»¯ÂÝÐýÄÚõ¥£¨Eq. (27)£©[143¨C145]¡£

In the cyclic addition of diynes (RCBBC¨C(CH2)m-CBBCR) with carbon dioxide in the presence of a zero valent nickel catalyst, the reaction with m = 3 or 4, easily proceeds to give two cyclic 2-pyrones in about 50¨C90% yields as shown in Eq. (28). However, the reaction with m = 2 and m = 6, the alternating copolymerization of the diynes and carbon dioxide proceeds to give a poly(2-pyrone) by an intermolecular cycloaddition, since the intramolecular cycloaddition reaction is difficult as shown in Eqs. (29) and (30) [150a,150b]. The reactions of these diynes and carbon dioxide in the presence of metal compounds gave the various kinds of polymeric compounds, e.g., an alternating copolymer as shown in Eq. (31) [145,150c,150d]

ÔÚÄøµ¥ÖÊ£¨0»¯ºÏ¼Û£©×÷Ϊ´ß»¯¼ÁµÄÌõ¼þÏ£¬ÅäλΪ3»òÕß4£¬Ñ­»·¼ÓÈë¶þȲÌþ£¨RCBBC¨C(CH2)m-CBBCR£©ÒÔ¼°¶þÑõ»¯Ì¼£¬ºÜÈÝÒ×·´Ó¦Éú³É¶þÔªßÁà«Íª£¨two cyclic 2-pyrones£©£¬²úÁ¿Îª50%-90%£¬·´Ó¦¹ý³Ì¼ûEq. (28)¡£È»¶ø£¬ÓÉÓÚ·Ö×Ӽ价¼Ó³É·´Ó¦ÊǷdz£ÄÑÒÔ½øÐеģ¬ÅäλΪ2»òÕß6ʱ£¬¶þȲÌþºÍ¶þÑõ»¯Ì¼µÄ½»Ìæ¹²¾Û×÷Óûáͨ¹ý·Ö×Ӽ价¼Ó³É·´Ó¦²úÉú¶à¾Û(2ßÁà«Íª)¡£¼û·´Ó¦(29)ºÍ(30) [150a,150b]¡£ÔÚ½ðÊôÅäºÏÎï´æÔÚµÄÌõ¼þÏ£¬ÕâЩ¶þȲÌþÓë¶þÑõ»¯Ì¼µÄ·´Ó¦»á²úÉú¸÷Öָ߷Ö×Ó¾ÛºÏÎ±ÈÈ磺°´·´Ó¦(31) [145,150c,150d]²úÉúµÄ½»Ìæ¹²¾ÛÎï¡£
2Â¥2013-04-29 18:05:09
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ monanfang04 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á£¬Çóµ¼Ê¦ÊÕ +8 ÌìÌìºÃÔËÀ´Éϰ¶° 2026-03-24 8/400 2026-03-28 20:23 by ÌÆãå¶ù
[¿¼ÑÐ] 311£¨085601£©Çóµ÷¼Á +4 liziyeyeye 2026-03-28 4/200 2026-03-28 18:50 by 535743368
[¿¼ÑÐ] 289Çóµ÷¼Á +11 ÐÂʱ´ú²ÄÁÏ 2026-03-27 11/550 2026-03-28 18:09 by YK¡£¡£
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤272Çóµ÷¼Á +9 °¢Ë¹µÙ·Ò2004 2026-03-28 9/450 2026-03-28 15:21 by 1018329917
[¿¼ÑÐ] 070300Çóµ÷¼Á306·Ö +4 26ÒªÉϰ¶ 2026-03-27 4/200 2026-03-28 13:06 by ÌÆãå¶ù
[¿¼ÑÐ] 266·Ö£¬Çó²ÄÁÏÒ±½ðÄÜÔ´»¯¹¤µÈµ÷¼Á +7 ÍÛºôºßºôºß 2026-03-27 9/450 2026-03-28 12:22 by zllcz
[¿¼ÑÐ] 081200-314 +3 LILIQQ 2026-03-27 4/200 2026-03-28 09:41 by ±£»¤µØÇòÄãÎÒ×öÆ
[¿¼ÑÐ] 291Çóµ÷¼Á +7 ‹üÈA 2026-03-22 7/350 2026-03-28 04:02 by fmesaito
[¿¼ÑÐ] 0703»¯Ñ§338Çóµ÷¼Á£¡ +6 Zuhui0306 2026-03-26 7/350 2026-03-27 10:35 by shangxh
[¿¼ÑÐ] 324Çóµ÷¼Á +5 hanamiko 2026-03-26 5/250 2026-03-27 10:33 by wangjy2002
[¿¼ÑÐ] Çóµ÷¼Á +8 Auroracx 2026-03-22 8/400 2026-03-26 19:55 by ²»³Ôô~µÄ؈
[¿¼ÑÐ] 289Çóµ÷¼Á +17 ˶ÐǸ° 2026-03-23 17/850 2026-03-26 16:18 by ²»³Ôô~µÄ؈
[¿¼ÑÐ] »·¾³×¨Ë¶324·ÖÇóµ÷¼ÁÍÆ¼ö +5 ÐùСÄþ¡ª¡ª 2026-03-26 5/250 2026-03-26 12:05 by i_cooler
[¿¼ÑÐ] 0854È˹¤ÖÇÄÜ·½ÏòÕÐÊÕµ÷¼Á +4 ÕÂСÓã567 2026-03-24 4/200 2026-03-25 13:29 by 2177681040
[¿¼ÑÐ] 282Çóµ÷¼Á +3 wcq131415 2026-03-24 3/150 2026-03-25 12:16 by userper
[¿¼ÑÐ] 289²ÄÁÏÓ뻯¹¤£¨085600£©BÇøÇóµ÷¼Á +4 ÕâôÃû×ÖÕ¦Ñù 2026-03-22 5/250 2026-03-25 08:20 by mx.yue
[¿¼ÑÐ] 085404µç×ÓÐÅÏ¢284·ÖÇóµ÷¼Á +4 13659058978 2026-03-24 4/200 2026-03-24 12:15 by syl20081243
[¿¼ÑÐ] Ò»Ö¾Ô¸ÖØÇì´óѧ085700×ÊÔ´Óë»·¾³£¬×Ü·Ö308Çóµ÷¼Á +7 īīĮ 2026-03-23 8/400 2026-03-23 20:36 by Creta
[¿¼ÑÐ] 308Çóµ÷¼Á +3 īīĮ 2026-03-21 3/150 2026-03-22 16:54 by i_cooler
[¿¼ÑÐ] 285Çóµ÷¼Á +6 ytter 2026-03-22 6/300 2026-03-22 12:09 by ÐÇ¿ÕÐÇÔÂ
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û