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tetraphenylcyclopentadienone
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Tetraphenylcyclopentadienone is an organic compound with the formula (C6H5)4C4CO. It is a dark purple to black crystalline solid that is soluble in organic solvents. It is an easily made building block for many organic and organometallic compounds.
==Structure==
The C5O core of the molecule is planar and conjugated. The C2-C3 and C4-C5 distances are 1.35 Å, while the C1-C2, C3-C4, C5-C1 are closer to single bonds with distances near 1.5 Å.〔 The phenyl groups of tetraphenylcyclopentadienone adopt a "propeller" shape in its 3D conformation. The four phenyl rings are rotated out of the plane of the central ring because of steric repulsion with each other.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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