有哪位做过用三氟乙酸做溶剂的碳谱?三氟乙酸的化学位移在哪呀? [ Last edited by anlittle on 2009-6-11 at 11:02 ] 返回小木虫查看更多
Protocol of the C-13 NMR Node Shift Base + Inc. Comment (ppm rel. to TMS) C 114.0 -2.3 aliphatic 21.8 1 alpha -C(=O)-O 210.3 3 alpha -F -2.5 1 gamma -C 0.3 1 delta -C -113.6 general corrections C 158.0 166.0 1-carboxyl 10.0 1 -C -5.0 1 -C from O-carboxyl -13.0 general corrections CH2 64.7 -2.3 aliphatic 9.1 1 alpha -C 54.9 1 alpha -O-C=O -2.5 1 gamma -C 0.0 3 delta -F 5.5 general corrections CH3 14.1 -2.3 aliphatic 9.1 1 alpha -C 6.5 1 beta -O-C=O 0.3 1 delta -C 0.5 general corrections,
搞错了,那是三氟乙酸乙酯的,这个是 Protocol of the C-13 NMR Node Shift Base + Inc. Comment (ppm rel. to TMS) C 116.2 -2.3 aliphatic 21.8 1 alpha -C(=O)-O 210.3 3 alpha -F -113.6 general corrections C 161.4 166.0 1-carboxyl 10.0 1 -C -14.6 general corrections
楼主要三氟乙酸的碳谱做什么呢?
一般发文章这个不用提供的,一般含氟的碳打碳谱时会裂分,但三氟乙酸不会,上面那数据基本可靠。
Protocol of the C-13 NMR
Node Shift Base + Inc. Comment (ppm rel. to TMS)
C 114.0 -2.3 aliphatic
21.8 1 alpha -C(=O)-O
210.3 3 alpha -F
-2.5 1 gamma -C
0.3 1 delta -C
-113.6 general corrections
C 158.0 166.0 1-carboxyl
10.0 1 -C
-5.0 1 -C from O-carboxyl
-13.0 general corrections
CH2 64.7 -2.3 aliphatic
9.1 1 alpha -C
54.9 1 alpha -O-C=O
-2.5 1 gamma -C
0.0 3 delta -F
5.5 general corrections
CH3 14.1 -2.3 aliphatic
9.1 1 alpha -C
6.5 1 beta -O-C=O
0.3 1 delta -C
0.5 general corrections,
搞错了,那是三氟乙酸乙酯的,这个是
Protocol of the C-13 NMR
Node Shift Base + Inc. Comment (ppm rel. to TMS)
C 116.2 -2.3 aliphatic
21.8 1 alpha -C(=O)-O
210.3 3 alpha -F
-113.6 general corrections
C 161.4 166.0 1-carboxyl
10.0 1 -C
-14.6 general corrections
楼主要三氟乙酸的碳谱做什么呢?
一般发文章这个不用提供的,一般含氟的碳打碳谱时会裂分,但三氟乙酸不会,上面那数据基本可靠。