Znn3bq.jpeg
²é¿´: 1166  |  »Ø¸´: 3
±¾Ìû²úÉú 1 ¸ö ·­ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴

nirenjie0627

½ð³æ (СÓÐÃûÆø)

[½»Á÷] Çë³æÓÑÃǰïæ·­ÒëÒ»¶Î»°£¬Ð»Ð»À²£¡

³ÆÈ¡Ò»Ëõ¶þÒÒ¶þ´¼63.6gÖÃÓÚËÄ¿ÚÉÕÆ¿ÖÐ,Á¿È¡PBr348mlÓÚºãѹµÎҺ©¶·ÖУ¬×°ÉÏÀäÄý¹Ü¡¢Î²ÆøÎüÊÕÒÔ¼°½Á°è×°Ö㬿ªÆô¼ÓÈȵçÔ´£¬½«PBr3»ºÂýµÎ¼ÓÖÁËÄ¿ÚÉÕÆ¿ÖУ¬2hµÎÍ꣬¿ØÖÆ·´Ó¦Î¶ÈΪ90¡æ£¬¼ÌÐø»ØÁ÷·´Ó¦6h¡£·´Ó¦²úÎïÓÃ10%
NaHCO3ÈÜÒº¡¢ÕôÁóË®¸÷Ï´3´Î£¬ÔÚ·Ö³öµÄÓлúÏàÖмÓÈë1.5gÎÞË®ÁòËáþ,½Á°è2min,¾²ÖÃ30min,¹ýÂ˵õ½1-äå-2-(2-äåÒÒÑõ»ù)ÒÒÍéÖмäÌå125.8g£¬ÊÕÂÊΪ90.4%(ÒÔÒ»Ëõ¶þÒÒ¶þ´¼Á¿¼Æ),±£´æ±¸Óá£

» ²ÂÄãϲ»¶

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

seaharrier

Ìú¸Ëľ³æ (ÖªÃû×÷¼Ò)

µÛ¹ú¿Õ¾üÖн«

¡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
nirenjie0627(½ð±Ò+30, ·­ÒëEPI+1):ллÀ²£¡ 2010-10-17 20:09:51
ringzhu(½ð±Ò+30): 2010-11-20 11:27:43
ringzhu(½ð±Ò+10):ÍêÈ«·¢·ÅÐüÉͽð±Ò ż¸øÄãÌÖ»ØÀ´µÄ ¹þ¹þ ¼ÇµÃлżŶ~~~ 2010-11-20 11:28:12
Weigh 63.6g of diethylene glycol and put it in four flasks. Take 348ml of PBr into the constant pressure dropping funnel, turn on the heating power after installing condenser, off-gas absorption and mixing device, and then drop slowly PBr3 into the four flasks with 2 hours controlling the reaction temperature at 90¡æ during this process, continuing reflux reaction within 6 hours. Reaction products are washed with 10% solution of NaHCO3 and distilled water each for 3 times. Add 1.5g of anhydrous magnesium sulfate into the separation of the organic phase, after 2 minutes of stirring and putting aside for 30 minutes, and get 125.8g of 1-bromo-2-(2-bromo ethoxy yl) ethane intermediate by filtering, and the coefficient of yield is 90.4% (by the amount of adiethylene glycol). And preserve and backup the products.
Patienceisbitter,butitsfruitissweet.
2Â¥2010-10-17 13:57:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

seaharrier

Ìú¸Ëľ³æ (ÖªÃû×÷¼Ò)

µÛ¹ú¿Õ¾üÖн«

ÒýÓûØÌû:
Originally posted by nirenjie0627 at 2010-10-17 10:06:54:
³ÆÈ¡Ò»Ëõ¶þÒÒ¶þ´¼63.6gÖÃÓÚËÄ¿ÚÉÕÆ¿ÖÐ,Á¿È¡PBr348mlÓÚºãѹµÎҺ©¶·ÖУ¬×°ÉÏÀäÄý¹Ü¡¢Î²ÆøÎüÊÕÒÔ¼°½Á°è×°Ö㬿ªÆô¼ÓÈȵçÔ´£¬½«PBr3»ºÂýµÎ¼ÓÖÁËÄ¿ÚÉÕÆ¿ÖУ¬2hµÎÍ꣬¿ØÖÆ·´Ó¦Î¶ÈΪ90¡æ£¬¼ÌÐø»ØÁ÷·´Ó¦6h¡£·´Ó¦²úÎïÓÃ1 ...

ΪºÎ½ð±Ò·¢·Å²»¹ý°ëÄÅ£¿

°³ÊÇÀ´Õõ½ð±ÒµÄŶ£¡
Patienceisbitter,butitsfruitissweet.
3Â¥2010-10-18 00:51:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hawkchai

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
Originally posted by seaharrier at 2010-10-17 13:57:49:
Weigh 63.6g of diethylene glycol and put it in four flasks. Take 348ml of PBr into the constant pressure dropping funnel, turn on the heating power after installing condenser, off-gas absorption an ...

//µäÐ͵ÄÖйúʽӢÓï
4Â¥2010-10-19 23:52:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ nirenjie0627 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤300Çóµ÷¼Á +30 Ф¿ªÎÄ 2026-04-09 32/1600 2026-04-10 10:59 by ×ÏÒí¾«Áé
[¿¼ÑÐ] Çóµ÷¼Á +3 µçÆø300Çóµ÷¼Á²» 2026-04-08 3/150 2026-04-10 10:19 by LHGeng
[¿¼ÑÐ] Ò»Ö¾Ô¸»ªÄÏÀí¹¤´óѧ331·Ö²ÄÁÏÇóµ÷¼Á +5 ÌìÏÂww 2026-04-09 5/250 2026-04-10 08:36 by 5268321
[¿¼ÑÐ] 0854µ÷¼Á +10 ³¤¹­°Á 2026-04-09 11/550 2026-04-09 19:03 by ̽123
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +14 Ò»ÑùYWY 2026-04-05 15/750 2026-04-09 13:36 by ¹ÊÈË??
[¿¼ÑÐ] ²ÄÁÏ307·ÖÇó´óÀÐ×éÊÕÁô +17 Hllºú 2026-04-07 17/850 2026-04-09 10:53 by liuhuiying09
[¿¼ÑÐ] һ־Ը³¶«´óѧ071000ÉúÎïѧѧ˶³õÊÔ·ÖÊý276Çóµ÷¼Á +3 Ľ¾øcc 2026-04-09 3/150 2026-04-09 09:57 by liuhuiying09
[¿¼ÑÐ] 264Çóµ÷¼Á +11 ÂóС¶£µ± 2026-04-07 11/550 2026-04-08 16:05 by Ò»Ö»ºÃ¹û×Ó?
[¿¼ÑÐ] 274Çóµ÷¼ÁÇóµ÷¼Á +10 Jachenbingoo 2026-04-06 13/650 2026-04-08 14:25 by zhq0425
[¿¼ÑÐ] 22408 266Çóµ÷¼Á +11 masss11222 2026-04-07 14/700 2026-04-08 11:06 by yulian1987
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +17 СÁõͬѧ߹߹ 2026-04-06 18/900 2026-04-07 11:41 by Ê«Óë×ÔÓÉ
[¿¼ÑÐ] Çóµ÷¼Á +4 µçÆøÐ¡Éñͯ 2026-04-04 6/300 2026-04-07 00:14 by guanxin1001
[¿¼ÑÐ] 287·ÖÇóµ÷¼Á ÓÐרÀû¹ú½±Ò»Ö¾Ô¸¹þ¹¤´ó085406 +6 °×Ò׳½ 2026-04-06 7/350 2026-04-06 22:46 by 875465
[¿¼ÑÐ] 285Çóµ÷¼Á +5 mapmath 2026-04-06 6/300 2026-04-06 17:18 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 0854Çóµ÷¼Á +4 assdll 2026-04-05 4/200 2026-04-06 12:29 by ÖзÉÔº¿Õ¹ÜѧԺÑ
[¿¼ÑÐ] 313Çóµ÷¼Á +5 º£ÈÕº£ÈÕ 2026-04-04 5/250 2026-04-05 15:52 by jndximd
[¿¼ÑÐ] ¹¤¿Æ277·ÖÇóµ÷¼Á²ÄÁÏ +8 ÉÏÁËÉÏÁËÉÏŶ 2026-04-05 9/450 2026-04-05 13:05 by wwytracy
[¿¼ÑÐ] Ò»Ö¾Ô¸±±¾©»¯¹¤´óѧ£¬³õÊԳɼ¨350Çóµ÷¼Á +9 ÑØ°¶?±´¿Ç 2026-04-04 14/700 2026-04-05 01:09 by ÑØ°¶?±´¿Ç
[¿¼ÑÐ] 325Çóµ÷¼Á +4 ´º·ç²»½èÒâ 2026-04-04 4/200 2026-04-04 14:46 by ÏæÅ©´¢ÄܲÄÁÏ
[¿¼ÑÐ] 085701Çóµ÷¼Á +7 ¹¨ÓíÃú 2026-04-04 8/400 2026-04-04 13:49 by ССÊ÷2024
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û