Abstract: Benzene and xylene are described having a unique distribution of deuterium and 13C such that ?(deuterium) for each of the benzene and xylene is less than ?250 and ?(13C) for the benzene is greater than ?36 and for xylene is less than ?24, wherein ?(deuterium)=(R?sample/R?standard?1)×1000 where R?sample is the ratio of deuterium to hydrogen in the benzene/xylene; and R?standard is the ratio of the natural abundance of deuterium to the natural abundance of hydrogen; and wherein ?(13C)=(R?sample/R?standard?1)×1000 where R?sample is the ratio of 13C to 12C in the benzene/xylene; and R?standard is the ratio of the natural abundance of 13C to the natural abundance of 12C.

Abstract: The present invention relates to a method for deuteration of an inert alkane using activated palladium carbon. The present invention discloses “A method for deuteration of a hydrogen atom of a methyl group or a hydrogen atom bonded to a carbon atom at benzyl position and the other carbon atoms of an alkylene group having not less than 2 carbon atoms, in a compound containing the methyl group or the-alkylene group having not less than 2 carbon atoms, directly bonded to an aromatic ring which may have a substituent, which comprises placing said compound in a deuterated solvent in the presence of activated palladium carbon, under sealed reflux condition”.

Abstract: A process for regioselective isomerization of organic compounds having a carbon-carbon double bond at a tertiary carbon atom by sulfur dioxide induced allylic rearrangement of a hydrogen atom and/or replacement of a proton in the allylic position by a deuteron. The organic compound is contacted with sulfur dioxide at temperatures between about 0.degree. and 70.degree. C. for a time sufficient to effect such isomerization to a more stable isomer; and if deuteration is to take place D.sub.2 O is provided in the solution.

Abstract: Beta pinene is converted to alpha pinene in liquid sulfur dioxide. The process is a regioselective isomerization of organic compounds having a carbon-carbon double bond at a tertiary carbon atom, by sulfur dioxide-induced allylic rearrangement of a hydrogen atom and/or replacement of a proton in the allylic position by a deuteron. The organic compound is contacted with sulfur dioxide at temperatures between about 0.degree. and 70.degree. C. for a time sufficient to effect such isomerization to a more stable isomer; and if deuteration is to take place D.sub.2 O is provided in the solution.