A short survey of bicyclic diamines
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syntheses and properties of N,N′-bridged-1,10-diazabicyclooctadeca-5,14-diynes
Abstract
The conformations and properties of 1,(k + 2)-diazabicyclo[k.l.m]alkanes are reviewed briefly. In these species the alkane chains allow inside protonation but no metal complexation. Inside metal complexation is made possible if the alkane chains incorporate alkyne units. The preparation and structures of bridged 1,10-diazacyclooctadeca-5,14-diynes are reported. As bridges we use simple ⋯
N distances between 3.16 Å and 6.52 Å. The intramolecular distances between the triple bonds vary between 4.25 Å and 7.31 Å.