Synthesis and Characterization of Some long-Chain Diesters with Branched or Bulky Moieties

central diol and diacid moieties were selected that bear structural resemblance (e.g., neopentyl glycol and 3,3,-dimethyl glutaric acid). Scheme I and Table I provide information on the exact nature of the compounds studied here. The compounds arising from the reaction of monoacids with diols will be termed diol dies tel's and those deri ved from diacids with monohydric alcohols will be termed diacid diesters in the following text. Besides studying the potential application of these compounds as additives in vegetable oil-based alternative diesel fuels, their analytical characterization, especially by positive chemical ionization (PCI) mass spectrometry (NIS) and 13C nuclear magnetic resonance (NIVIR), is reported. Some other patent syntheses (21,22) of compounds such as the present ones have been reported. Nonpatent syntheses include some compounds with neopentylglycol as diol (23), compounds derived from cCCI.-dimethylalkanoic acids and polyols (24), esters from dodecanedioic acid, and mono-alcohols (25) as well as the enzymatic synthesis of related wax