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nirenjie0627

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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%
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seaharrier

Ìú¸Ëľ³æ (ÖªÃû×÷¼Ò)

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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)

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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 ...

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Patienceisbitter,butitsfruitissweet.
3Â¥2010-10-18 00:51:38
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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
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