ufonmr
第1楼2012/06/13
the relaxation time T1 of the quadrupolar nuclei 11B is rapid (1/T1 ~= 2*pi*J), 13C next to 11B (T1 = 10e-1 to 10e-2s, J13C-11B = 20 to 80 Hz) is likely to produce broadened lines, except 11B is positioned at the centre of the molecule and experiences a fairly symmetrical
field.
ufonmr
第3楼2012/06/14
If the coupling is observable, 1:1:1:1 quartet is shown for a 13C bonded to 1 11B atom (3/2, 80%).
Magn Reson Chem. 2009 October; 47(10): 873–878.
doi: 10.1002/mrc.2467
http://www.znaturforsch.com/ab/v60b/s60b0259.pdf
http://www.chem.wisc.edu/areas/reich/nmr/notes-7-multi.pdf
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