Chemistry Reference
In-Depth Information
CO
O
CO
O
CO
O
+
NH
CO
O
(H
+
) -H
2
O
CO
O
O
CO
CO
O
C
CO
O
H
CO
CO
O
CO
O
(HO)
2
B
B(OH)
2
Br
PO
+
3
_ _ _ _ _
PO
_ _ _ _ _
PO
_ _ _ _ _
PO
_ _ _ _ _
Formula 10.3
2,000 Da. A slight increase in the a
2
/b
3
feed ratio from 1.0/1.0 to 1.1/1.0 entailed a
conspicuous change of the architectures. Openly branched polyethers almost dis-
appeared, and the fraction of multicyclic polyethers dramatically increased (see
Formula
10.1
). The formulas BnCX used in these mass spectra are defined and
cyclic elements and 12 repeat units. It should be noticed that the mass spectra do
not allow for a differentiation between plain cycles ((a) in Formula
10.4
) and
