2.5- Dimethyl-2,6-hexanediol

The synthesis of copolycarbonates from 2,5-dimethyl-2,5-hexanediol and bis(hy-droxymethyl)benzene was also achieved by this method.[264]... 

A new synthesis of pyrrolizidine, which is based on the reaction of bis-tertiary glycols with co-chloronitriles, was reported by Meyers and Libano.28 The method involves three steps (a) condensation of 2,5-dimethyl-2,5-hexanediol (48) with 4-chlorobutyronitrile in the presence of sulfuric acid to give a derivative of A 1-pyrroline (49), (6) reduction of 49 with sodium borohydride to give the corresponding pyrrolidine (50), and (c) intramolecular cyclization of the pyrrolidine in the presence of alkali to give the pyrrolizidine derivative 51. The three-step synthesis was performed without isolation of the intermediate products. 

Fig. 21.16. Section of the crystal structure of 2,5-dimethyl-2,5-hexanediol-4H20. Oxygen atoms are drawn black, carbon and hydrogen atoms as large and small circles, respectively. Note the homodromic infinite chains running in opposite directions and linked in the form of antidromic pentagons [817]...

Jeffrey GA, Shen MS (1972) Crystal structure of 2,5-dimethyl-2,5-hexanediol tetrahydrate A water-hydrocarbon layer structure. J Chem Phys 57 56- 61... 

In the Absence of Oxygen Methanol, Ethanol, 2-Propanol, and t-Butyl Alcohol Alcohols such as methanol, ethanol, and 2-propanol are converted with Pt/Ti02 to the corresponding dehydrogenation products such as formaldehyde, acetaldehyde, and acetone, respectively, with the formation of equimolar H2. t-Butyl alcohol is converted into 2,5-dimethyl-2,5-hexanediol with the formation of H2 through intermolecular dimerization since t-butyl alcohol has no alpha-hydrogen. In these oxidative reactions, alcohols are oxidized by photoformed holes, while photoexcited electrons reduce water (or H" ) to form H2 [4]. 

Treat 2,5-dimethyl-2,5-hexanediol [1] with HCl gas in cone HCl at O C for 15 min to obtain 2,5-dichloro-2,5-dimethylhexane [2] Store [2] m a sealed tube because the compound is highly volatile (4)... 

Solns. of HgOg and FeS04 added simultaneously and equivalently during 20 min. below 20° to a soln. of terf-butanol in aq. H2SO4 -> 2,5-dimethyl-2,5-hexanediol. 

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