²é¿´: 888  |  »Ø¸´: 2
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

caofy200707

ľ³æ (ÕýʽдÊÖ)

[ÇóÖú] Çó¸ßÈË·­Ò룡£¡£¡£¡ ÒÑÓÐ1È˲ÎÓë

The strong rate acceleration observed in the thermal rearrangement of traps-9-decalyl-peroxybenzoate to 1-benzoyloxy-l,6-epoxycyclodecane with increasing solvent polarity (rate factor ca. 102) is in accordance with the postulated heterolytic O-O bond cleavage leading to a dipolar activated complex.The decomposition of traps-9-decalyl-peroxyphenylacetate (no. 10 in Table 5-9) is an interesting borderline reaction. Depending on the reaction medium, either the hetero-cyclic Criegee mechanism or the homolytic fragmentation mechanism can be observed[207]. In alcohols, the decomposition occurs mainly by the heterolysis pathway, whereas in nonpolar solvents like ethylbenzene, the homolysis pathway predominates. In aceto-nitrile, both mechanisms compete, as evidenced by the product distribution. The thermolysis of this particular perester is thus an impressive example of the strong influence which solvents may have, not only on reaction rates but also on the mechanism of achemical reaction (cf. Section 5.5.7 for further examples). In addition, it should be mentioned that peresters such as tert-butyl cycloheptatrieneperoxycarboxylate undergo heterolytic fragmentation if the reaction is acid-catalyzed [195, 212]. The base-catalyzed ionic fragmentation of tert-butyl peroxyformate has already been entioned [110]; cf.Eq. (5-39b).
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

³É¹¦ÔÚÓÚ»ýÀÛ
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

»·±£Ð¡ÎÀÊ¿

ľ³æ (ÕýʽдÊÖ)

ÉͽðÌ«ÉÙ¡£¡£¡£

[ ·¢×ÔСľ³æ¿Í»§¶Ë ]
ѧº£ÎÞÑÄ
3Â¥2014-04-28 00:15:22
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 3 ¸ö»Ø´ð
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[˶²©¼ÒÔ°] ÊÛSCIÒ»ÇøÎÄÕ£¬ÎÒ:8.O.55.1.O.54,¿ÆÄ¿ÆëÈ«,¿ÉÙ¤¼± +5 ASdOkHsho7FD 2026-08-28 8/400 2026-08-29 11:39 by jCd0dEvKHShX
[ÕÒ¹¤×÷] ÊÛSCIÎÄÕ£¬ÎÒ:8O5.5.1.O.54,¿ÆÄ¿ÆëÈ«,¿É+¼± +4 ASdOkHsho7FD 2026-08-28 6/300 2026-08-29 11:29 by jCd0dEvKHShX
[»ù½ðÉêÇë] ¹ú×ÔÈ»ÃæÉϸ´ÅÌ~»¶Ó­ÌÖÂÛ (½ð±Ò+15) +14 ÇçÌì¼ÓÓÍ 2026-08-26 15/750 2026-08-29 11:06 by biily
[»ù½ðÉêÇë] ͶƱ:  ÓжàÉÙÈËÊǽñÌì²éϵͳ֪µÀ½á¹ûµÄ£¿ +16 °®¿´ÊéµÄ¿ÉÀÖ 2026-08-26 18/900 2026-08-29 10:18 by winsaint
[½Ìʦ֮¼Ò] ÊÛSCI-T0PÎÄÕ£¬ÎÒ:8O.5.5.1.O.54,¿ÆÄ¿ÆëÈ«,¿É+¼± +4 ASdOkHsho7FD 2026-08-28 7/350 2026-08-29 09:26 by G6APbkg8SA6w
[»ù½ðÉêÇë] 2026ÄêÒ¶ÆóËï»ù½ð +4 bud_bud 2026-08-27 7/350 2026-08-29 07:23 by foolishmani
[²©ºóÖ®¼Ò] ÊÛSCIÎÄÕ£¬ÎÒ:8O.5.5.1O.54,¿ÆÄ¿È«,¿ÉÊ®¼± +3 ASdOkHsho7FD 2026-08-28 4/200 2026-08-29 05:45 by gy1nBQXYQJqL
[»ù½ðÉêÇë] ϵͳ²é²»µ½ +11 ¶­°Ëǧ 2026-08-26 11/550 2026-08-28 18:06 by Leogzhya
[»ù½ðÉêÇë] Â鷳ר¼ÒÃÇ¿´¿´ÆÀίÃǵÄÒâ¼û£¨F¿ÚÃæÉÏ£© +4 gdd2018 2026-08-28 9/450 2026-08-28 14:22 by jklily
[»ù½ðÉêÇë] Ôõô²é°¡ +6 huang1991js 2026-08-26 6/300 2026-08-28 08:42 by winsaint
[»ù½ðÉêÇë] »ù½ðδÖУ¬ÕâÖÖ´ð¸´ÊÇÄ£°åÂ𣿠+5 zhaosm1982 2026-08-27 6/300 2026-08-27 16:00 by lfy8008
[»ù½ðÉêÇë] 2026ÄêµÄ¹ú¼ÒÉç¿Æ»ù½ðÏîĿͨѶÆÀÉóµÄйæÔòÓëж¯Ïò¡¢ÐÂÌôÕ½ +7 process2012 2026-08-23 10/500 2026-08-26 19:23 by hmhminy
[»ù½ðÉêÇë] ·¶½øÖоÙÒ»ÎĵÄÖÐÐÄ˼Ïë +9 Ñ׻ƹóëÐ 2026-08-22 10/500 2026-08-26 15:40 by semaglutide
[»ù½ðÉêÇë] ϵͳ½ø²»È¥ +4 yanglien 2026-08-26 5/250 2026-08-26 11:10 by wenfengw83
[»ù½ðÉêÇë] ÏîÄ¿ÐÅÏ¢ºÍ¾­·ÑÐÅÏ¢ÔÚϵͳÀï¶¼¿ÉÒÔ¿´µ½ÁË +6 wittyboy 2026-08-26 14/700 2026-08-26 10:55 by wittyboy
[»ù½ðÉêÇë] ¹úºÏ¿É²éÁË +3 paperzjh 2026-08-26 3/150 2026-08-26 10:41 by LemmonTr
[Ö°³¡ÈËÉú] ѧÉúײ¼û¸¨µ¼Ô±ËÍÍâÂô£¬µÚ¶þÌìÈ«°à¶¼³ÁĬÁË +3 ¾¨ÓãÈÚ½ð_Õã½­_É 2026-08-22 3/150 2026-08-26 09:01 by zzuzxg
[»ù½ðÉêÇë] ÔÚ¼á±ù»¹¸Ç×ű±º£µÄʱºò£¬ÎÒ¿´µ½ÁËÅ­·ÅµÄ÷»¨¡£ (½ð±Ò+10) +6 ziyangfang 2026-08-25 9/450 2026-08-25 20:26 by huagongfeihu
[»ù½ðÉêÇë] Ã÷ÌìÓ¦¸Ã¿É²éÁË£¡£¿ +6 chengyan1220 2026-08-23 6/300 2026-08-25 19:45 by zfd97
[»ù½ðÉêÇë] ûÓÐÈκÎÏûÏ¢-ÊDz»ÊǾÍÁ¹ÁË +9 ͼÀ²Í¼À² 2026-08-24 10/500 2026-08-25 11:59 by ÄϺ£Ð¡¸ç
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û