Zur Uferbefestigung von WasserstraBen und Hafen werden haufig Spundwande eingebaut. Diese setzen sich aus einzelnen Bohlen zusammen, welche durch ihre Verzahnung mittels sogenannter Schlosser zu einem stabilen Gebilde zusammen-0 VCH Verlagsgesellschaft mbH, D-6945 1 Weinheim, 1995 0947-5117/95/1 I 1 1-0639$5.00+.25/0
Legt man Glutaraldehyd (I) in wäßrig‐basischer Lösung im Überschuß vor und dosiert die Phosphonate (IIa)‐(Ilc) zu, so erfolgt Cyclisierung zu den Cyclohexenolen (IIIa)‐(IIIc).
Ketelaar (8) reports a value of 214 kcal. per mole. The dissociation energies were obtained from Wilkins (9). Agreement between calculated and measured heat of formation is good.
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