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Heteroatom Chemistry
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Heteroatom Chemistry
/
2019
/
Article
/
Tab 3
/
Research Article
[4+2] versus [2+2] Homodimerization in P(V) Derivatives of 2,4-Disubstituted Phospholes
Table 3
31
P NMR chemical shifts (ppm) (CDCl
3
) of
4
and
5
(
done in acetone-d
6
).
Entry
R
1
4
5
1
Ph
(
a
)
11.3
71.2
2
Trimethylsilyl
(
b
)
31.9
66.1
No dimer
3
t-Butyl
(
c
)
1.4
51.7
No dimer
4
4-F-Ph
(
d
)
11.9
53.5
71.2