Restricted rotations in 4,6-bis- and 2,4,6-tris-(N,N-dialkylamino)-s-triazines
- 1 January 1996
- journal article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 3,p. 443-447
- https://doi.org/10.1039/p29960000443
Abstract
Barriers to rotation have been measured in some 4,6-bis- and 2,4,6-tris-(N,N-dialkylamino)-s-triazines. X-Ray crystal structures are reported for 2-chloro-4,6-bis(diisopropylamino)-s-triazine 1,2,4,6-tris(diisopropylamino)-s-triazine 6,2,4,6-tris(diisobutylamino)-s-triazine 8 and the tetrakis(dibutylamino) derivative 12. In the isopropyl compounds 1 and 6, the structures are precisely ordered with all the isopropyl groups in the same direction: the dynamic NMR behaviour is in good agreement and barriers for rotation around the N–Ar and N–Cα bonds in 1 were assigned as 15.6 and 12.1 kcal mol–1, respectively.Keywords
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