Variable-temperature protonand pulsed proton noise-decoupled carbon-13 Fourier transform n.m.r. have been used to determine the inversion barriers and conformations of cis- and trans-1, 4, 5, 8-tetra methyl decahydropyrazino[2,3-b]pyrazine. The rate processes causing the spectral changes are discussed.
I. J. Ferguson, A. R. Katritzky and R. Patel, J. Chem. Soc., Perkin Trans. 2, 1976, 1564 DOI: 10.1039/P29760001564
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