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The reaction of NaAl(PH2)4 with benzoyl chloride does not yield benzoyl phosphines (C6H5-CO-)xPH3−x, but aluminium-tris(dibenzoylphosphide). The compound crystallizes in the space group P1 with two molecules in the unit cell. As shown by X-ray structure determination the aluminium atom is octahedrally surrounded by six oxygen atoms of three dibenzoyl phosphide anions (C6H5-CO-)2P−. The angles in the chelate ring are compared with the corresponding values of dipivaloyl phosphine and otherdoi:10.18419/opus-7380 fatcat:zvcgilk6hbe6vkkycbw22yukam