ProbFemR-IIF. BEriow Is the 300 MHz 1H NMR spectrum of a nearly 1:1 mixlured me E and Z Isdmen; al 1.2-JSehlofoelhyleirM. Also stiOwn is a vertical and noriijr.ld; expansion.
Problem R-12F r.C3HpCI=|
300 MHz nH NMFt spetlrtjm irt CDCl3 (Source-: ReEChfASV 0+r43)
Peak A
l-'i-iK
Fi'ak_
fhi i ill ii ill ii i Iii ii I ii ill ii i ill ii i In ii I ii ii I ii i ill ii i lim In ii I ii i ill ii ill ii i In ii I ii i ilin ill ii i In ii I ii ii I ii i ill ii i In ii
ZC20 ZDQO 19B0 1960 1340 1920 1900 IflSD 1860 184D 1B20 IflOD
Hz
■ I.........I.........1.........I.........I.........1.........I.........I.........I i i i i I i i i i I i i i i I i i i i I i i i
10
E
5
ppm
Indicate which peak (A or B) is ds and which is trari ü 1,2-dichlürotiIflylena. üummanze all chömjcäi shift arvdfef coupling mfcrmalion yau obtained from the speelrum.
CI Peak LJ
PEak A
Peak B
Peak i
'4th =12 Hz
11 ii i il i ii i h ii i Iii ii i ii ill ii i il i ii i Ii i ii I ii ii I ii i ill ii ill ii i h i ii I ii i ill ii ill ii i In ii In ill ii i il i in In ill ii ii I ii ill in ill i
19M 1960 1920 IBM 1B8D 1SEC 1S4D 1820 1B0Q
Hi
I.........1.........1.........1.........1.........1.........1.........1.........1 ■ ■ ■ ■ I ■ ■ ■ ■ i ■ ... I ■ ... I ...
10
5
5
ppm
1
Indicate which peak (A c-r B i is eis arte which is trans 1,2-dithloroelhylene. Summarize al chemical stirfl and/of coupling inlcrmaiion yau oblaimed frum the spectrum.
The eis and Irans 3-band Jm can be measured directly from the !3C satellites of each peak - the one at ü 6.42 has a coupling al 6 Hz. thus as isomer. !he one at n €.35 has J^H = 12 Hz, so Irans isomer