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dem-3882608

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the temperature of solution initially increased by ca. 15 oC
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dem-3882608

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Anhydride  Synthesis:The acyl chloride (6.9 mmol) was  added to a solution
of 20 mL of previously dried benzene and dry pyridine (7.0  mmol)
under  nitrogen.  Stirring was  continued  until 'a finely divided
white precipitate was observed which indicated the formation  of
the reactive acyl halide-pyridinium  complex. The reaction vessel
waa  placed in an ice bath at -10  oC  and the carboxylic acid was
added  all  at once.  The  temperature  of  the  solution  initially
increased by ca. 15 oC, but returned to a lower temperature after
stirring for an additional 20 min at -10  oC. The reaction mixture
was filtered through Celite on a glass frit.  The solvent was then
removed in vacuo  to yield product which was purified as indicated
below.
¶ÔÓÚThe  temperature  of  the  solution  initially increased by ca. 15 oC
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8Â¥2010-08-08 13:25:17
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Elffeng

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westzilch(½ð±Ò+1):лл½»Á÷£¡ 2010-08-08 16:10:09
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Elffeng
3Â¥2010-08-08 10:35:24
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caodaoba2010

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westzilch(½ð±Ò+1):Ö§³Öгæ~ 2010-08-08 16:10:22
ÒýÓûØÌû:
Originally posted by dem-3882608 at 2010-08-08 09:30:28:
the temperature of solution initially increased by ca. 15 oC
ca ÊÇʲô¶«Î÷£¿

15ºóÃæÄǸöÊÇÉãÊ϶Ȱɣ¬ca Ó¦¸ÃÊÇÒ»¸öʱ¼äµ¥Î»£¬Ã¿¶à³¤Ê±¼äÉý¸ß15¶È
4Â¥2010-08-08 12:56:29
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caodaoba2010

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
Originally posted by dem-3882608 at 2010-08-08 09:30:28:
the temperature of solution initially increased by ca. 15 oC
ca ÊÇʲô¶«Î÷£¿

Ò²¿ÉÄÜÊÇ¡°´óÔ¼¡±µÄÒâ˼£¬¾ä×ÓÒâ˼ÊÇ¡°¸Õ¿ªÊ¼£¬ÈÜҺζÈÉý¸ßÁË´óÔ¼15ÉãÊ϶ȡ±
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