Title: Pinacol
CAS Registry Number: 76-09-5
CAS Name: 2,3-Dimethyl-2,3-butanediol
Additional Names: pinacone; tetramethylethylene glycol
Molecular Formula: C6H14O2
Molecular Weight: 118.17
Percent Composition: C 60.98%, H 11.94%, O 27.08%
Literature References: Prepd by the reduction of acetone: Holleman, Rec. Trav. Chim. 25, 206 (1906); R. Adams, E. W. Adams, Org. Synth. coll. vol. I, 459 (2nd ed., 1941); DE 233894 in Frdl. 10, 1000. Convenient lab procedure: L. F. Fieser, Experiments in Organic Chemistry (Boston, 3rd ed., 1955) p 101. Crystal structure: G. A. Jeffrey, A. Robbins, Acta Crystallogr. B34, 3817 (1978).
Derivative Type: Hexahydrate
Molecular Formula: C6H14O2.6H2O
Molecular Weight: 226.27
Percent Composition: C 31.85%, H 11.58%, O 56.57%
Properties: Four-sided plates from water. mp 45.4°; d15 0.967 (supercooled liquid). The anhydr compd crystallizes in needles from alc or ether, mp 41.1°; bp760 174.4°. Freely sol in hot water, in alc, in ether; slightly sol in cold water, carbon disulfide.
Melting point: mp 45.4°; mp 41.1°
Boiling point: bp760 174.4°
Density: d15 0.967 (supercooled liquid)
Derivative Type: Dimethyl ether
Molecular Formula: C8H18O2
Molecular Weight: 146.23
Percent Composition: C 65.71%, H 12.41%, O 21.88%
Properties: Liquid. Agreeable odor. bp 144°.
Boiling point: bp 144°

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