| ²é¿´: 351 | »Ø¸´: 3 | ||
yalefield½ð³æ (ÎÄ̳¾«Ó¢)
ÀϺºÒ»Ã¶
|
[ÇóÖú]
Çë½Ì£ºacid finally the choice
|
|
In the organic laboratory, crystallization is usually the most rapid and convenient method for purifying the products of a reaction. Initially you will be told which solvent to use to crystallize a given substance and how much of it to use; Later on you will judge how much solvent is needed, acid finally the choice of both the solvent and its volume will be left to you. It takes both experience and knowledge to pick the correct solvent for a given purification. ÇëÎÊ£¬acid finally the choice ÖУ¬acidÊÇʲôÒâ˼£¿ |
» ²ÂÄãϲ»¶
22408µ÷¼Á315·Ö
ÒѾÓÐ3È˻ظ´
²ÄÁÏ¿¼Ñе÷¼Á
ÒѾÓÐ26È˻ظ´
»¯¹¤µ÷¼ÁÇóµ¼Ê¦ÊÕÁô£¡Ò»Ö¾Ô¸Ê§Àû£¬Ì¤Êµ¿Ï¸É£¬ÓÐÖ²ÎïÌáÈ¡¿ÆÑоÀú
ÒѾÓÐ21È˻ظ´
290Çóµ÷¼Á
ÒѾÓÐ4È˻ظ´
ҩѧ305Çóµ÷¼Á
ÒѾÓÐ8È˻ظ´
¸´ÊÔµ÷¼Á
ÒѾÓÐ6È˻ظ´
0831Ò»ÂÖµ÷¼Áʧ°ÜÇóÖú
ÒѾÓÐ6È˻ظ´
ÇóÖúµ÷¼Á£¬¿çµ÷
ÒѾÓÐ11È˻ظ´
291Çóµ÷¼Á
ÒѾÓÐ7È˻ظ´
272·Ö²ÄÁÏ×ÓÇóµ÷¼Á
ÒѾÓÐ45È˻ظ´
» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:
Çë½Ìµ¥Î»µÄ»»Ëã¹ØÏµ£¬É«Æ×ÖÐpg/secÓëmg/lÖ®¼äµÄ¹ØÏµ
ÒѾÓÐ4È˻ظ´
Çë½Ì£ºï®µç³Ø²âÊÔ³ä·ÅµçÍ£ÏÂÀ´¼¸ÌìºóÔÙ²âÈÝÁ¿Ë¥Í˺ܴóµÃÔÒò
ÒѾÓÐ4È˻ظ´
the co-occurring secologanic acidÔõô½âÊÍ£¿
ÒѾÓÐ6È˻ظ´
hope my choice is the right
ÒѾÓÐ9È˻ظ´
Çë½Ìº¸½ÓÍÊ±ÒøÆ¬Á÷¶¯Âý,²úÆ·Ò×Ñõ»¯µÄÔÒò
ÒѾÓÐ9È˻ظ´
Synthetic scheme of the derivative of coumarin-3-carboxylic acid
ÒѾÓÐ5È˻ظ´
¡¾ÇóÖú¡¿Çë½Ì£ºÒºÏàÒÇÆ÷¼ì²âÑùÆ·³öÏÖÎÊÌ⣿£¿
ÒѾÓÐ3È˻ظ´
Çë½Ì¹ØÓÚSpringerµÄOpen Choice
ÒѾÓÐ3È˻ظ´
¹Å¿É¤×
ÈÙÓþ°æÖ÷ (ÎÄ̳¾«Ó¢)
- ÍâÓïEPI: 10
- Ó¦Öú: 91 (³õÖÐÉú)
- ¹ó±ö: 16.835
- ½ð±Ò: 19237.1
- É¢½ð: 40372
- ºì»¨: 275
- ɳ·¢: 183
- Ìû×Ó: 25406
- ÔÚÏß: 1082.3Сʱ
- ³æºÅ: 1034379
- ×¢²á: 2010-06-02
- ÐÔ±ð: GG
- רҵ: Ò©ÎïÉè¼ÆÓëÒ©ÎïÐÅÏ¢
- ¹ÜϽ: µ¼Ê¦ÕÐÉú

2Â¥2011-09-17 09:39:13
¹Å¿É¤×
ÈÙÓþ°æÖ÷ (ÎÄ̳¾«Ó¢)
- ÍâÓïEPI: 10
- Ó¦Öú: 91 (³õÖÐÉú)
- ¹ó±ö: 16.835
- ½ð±Ò: 19237.1
- É¢½ð: 40372
- ºì»¨: 275
- ɳ·¢: 183
- Ìû×Ó: 25406
- ÔÚÏß: 1082.3Сʱ
- ³æºÅ: 1034379
- ×¢²á: 2010-06-02
- ÐÔ±ð: GG
- רҵ: Ò©ÎïÉè¼ÆÓëÒ©ÎïÐÅÏ¢
- ¹ÜϽ: µ¼Ê¦ÕÐÉú

3Â¥2011-09-17 10:09:20
yalefield
½ð³æ (ÎÄ̳¾«Ó¢)
ÀϺºÒ»Ã¶
- Ó¦Öú: 129 (¸ßÖÐÉú)
- ¹ó±ö: 0.17
- ½ð±Ò: 21238.9
- É¢½ð: 3440
- ºì»¨: 66
- Ìû×Ó: 12101
- ÔÚÏß: 759.1Сʱ
- ³æºÅ: 96063
- ×¢²á: 2005-10-07
- רҵ: ¸ßµÈ½ÌÓýѧ
- ¹ÜϽ: ¼ÆËãÄ£Äâ
|
£¨1£©ËùÒÔ£¬°³»³ÒÉÊÇ´ò´íÁË£» £¨2£©´ÓÄÚÈÝÀ´Ëµ£¬Óë¡°Ëᣨacid£©¡±Ò²Ã»Ê²Ã´¹ØÏµ¡£ £¨3£©°³¾õµÃÊDz»ÊÇ¿ÉÒÔÕâÑù£º Initiall,y you will be told which solvent to use to crystallize a given substance and how much of it to use. Later on, you will judge how much solvent is needed. Finally, the choice of both the solvent and its volume will be left to you. |
4Â¥2011-09-17 10:58:14













»Ø¸´´ËÂ¥