Chemistry Reference
In-Depth Information
SCHEME 5.5
Convergent synthesis of second-generation dendrimer
19 (B-G2)
.
19
B-G2
space filling of these dendrimers. It was found that
(
) adopts a false propeller
structure while
a true propeller shape.
Furthermore, these NMR studies have proven only slow angular motion for the
terminal groups, while the motion of whole dendrons was excluded even at higher
HPB-G2
FIGURE 5.1
First-generation polyphenylene dendrimers with four different cores (a)
B-G1
,
Biph-G1
,
TPM-G1
, and
HPB-G1
and (b) their semiempirically calculated AM1 models, very
similar to their X-ray structures (not shown).
