We present a study of the magnetic field-dependent thermal transport in the spin S=1 chain material Ni(C(2)H(8)N(2))(2)NO(2)(ClO(4)) (NENP). The measured thermal conductivity is found to be very sensitive to the field-induced changes in the spin excitation spectrum. The magnetic contribution to the total heat conductivity is analyzed in terms of a quasiparticle model, and we obtain a temperature and momentum independent mean free path. This implies that the motion of quasiparticles is effectively three dimensional despite the tiny interchain coupling.

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Tricyclic keto‐diols have been synthesized from 2‐cyclopenten‐1‐one in a three‐step annulation procedure. The importance of aryl ring electronics and steric contributions and the choice of Lewis acid were investigated for the final cyclization step. An unexpected cyclization product was identified, suggesting multiple mechanisms for the cyclization process.