β-DIKETONE INTERACTIONS Part 4. The structures and properties of 1,3-diphenyl-2-methylpropane-1,3-dione, C16H14O2, and 1,3-diphenyl-2-(4-methoxyphenyl)propane-1,3-dione, C22H18O3

DOI: 10.1016/0022-2860(87)85073-1

Source and publish data:

Journal of Molecular Structure p. 181 - 192 (1987)

Update date:2022-08-12

Topics:

Authors:

Emsley, John

Freeman, Neville J.

Hursthouse, Michael B.

Bates, Paul A.

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Article abstract of DOI:10.1016/0022-2860(87)85073-1

The X-ray crystal structures of 1,3-diphenyl-2-methylpropane-1,3-dione and 1,3-diphenyl-2-(4-methoxyphenyl)propane-1,3-dione show them both to adopt cis-diketo (Z,Z) conformations with carbonyl-carbonyl dihedral angles of 89.0(3)deg (2-methyl derivative), and 85.5(4)deg and 77.7(4)deg for the two molecules in the asymmetric unit of the 2-(4-methoxyphenyl) derivative.These are the first acyclic β-diketones with an α-hydrogen to be reported which do not have an enol configuration in the solid state.

Full text of DOI:10.1016/0022-2860(87)85073-1

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