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Molecules of the title compound, [Fe(C5H5)(C16H16NO2)], are stabilized by intramolecular hydrogen bonds (N—H...O=C) and are linked by intermolecular hydrogen bonds (O—H...O=C) to form centrosymmetric R22(16) dimers.

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The title compound, [Mo2(P2)(CO)4(C8H9O2)2], which was synthesized by refluxing a toluene solution of [(η5-CH3CH2O2CC5H4)2Mo2(CO)6] and P4 under N2, has a tetra­hedral [Mo2P2] core with a transverse coordinated P2 ligand and an [(η5-CH3CH2O2CC5H4)Mo(CO)2] moiety. The P—P distance of the coordinated P2 ligand is 2.089 (2) Å.

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In the title compound, [Ni(C22H22FeNO)2], the NiII ion lies on an inversion center and has a square planar coordination geometry formed by bidentate en­amino­ne ligands. The Ni-N and Ni-O bond distances are 1.928 (2) and 1.850 (2) Å, respectively.

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The title compound, C16H15NO2·C2H5OH, has been synthesized by the reaction of benzoyl­acetone with 2-amino­phenol in ethanol. The en­amino­ne structure is stabilized by a strong intramolecular hydrogen bond (N—H...O=C), while the one-dimensional infinite chain in the [010] direction is formed by the intermolecular O—H...O hydrogen bond between the en­amino­ne and the ethanol solvent mol­ecule.

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The title compound, [Fe2(C5H5)2(C22H20N4O2)], has been synthesized by the reaction of ferrocenoylacetone and butane­dioic acid dihydrazide in ethanol. The dihedral angles between one pyrazole ring and the attached cyclopentadienyl ring and carbonyl plane are 33.5 (4) and 4.4 (8)°, respectively; for the other pyrazole ring, the corresponding angles are 29.5 (4) and 11.2 (8)°, respecively.

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The title compound {systematic name: (S)-ethyl 2-[1-(1-ferrocenylcarbon­yl)prop-1-en-2-ylamino]-3-phenyl­propionate}, [Fe(C5H5)(C20H22NO3)], has been synthesized by the reaction of ferrocenoylacetone with ethyl L-phenyl­alanine in ethanol. The two nearly parallel cyclo­penta­dienyl rings in the ferrocenyl moiety adopt an eclipsed conformation.

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The title compound, [Fe(C5H5)(C14H18NO4)]·CH2Cl2, has been synthesized by the reaction of ferrocenoylacetone with DL-serine ethyl ester in ethanol. Electron delocalization is observed within the enaminone moiety.

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The title compound, C6H5COCH=C(NHCH2CH2OH)CH3 or C12H15NO2, has been synthesized by the reaction of benzoyl­acetone and ethano­lamine in ethanol. In the crystalline state, mol­ecules are linked by inter­molecular hydrogen bonds (O—H...O=C) to form centrosymmetric R22(14) dimers.

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The title compound, [Fe(C5H5)(C10H13N2O2], has been synthesized by the reaction of acetyl­ferrocene and hydrazine ethyl carbazate. Mol­ecules of the title compound form centrosymmetric R22(8) dimers via inter­molecular N—H...O=C hydrogen bonds.

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The title compound, [Fe(C5H5)(C13H10NO2)], has been synthesized by the Claisen condensation reaction of acetyl­ferrocene and ethyl picolinate in the presence of sodium ethoxide. The enone structure is stabilized by a strong [OH...O=C] intra­molecular hydrogen bond.

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The title compound, C18H19NO, has been synthesized by the condensation reaction of benzoyl­acetone and L-(−)-α-phenyl­ethyl­amine. The enaminone structure is stabilized by a strong N—H...O=C intra­molecular hydrogen bond.

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The title compound, C21H16ClNO, has been synthesized by the condensation reaction of dibenzoyl­methane and 2-chloro­aniline in the presence of p-TsOH. The enaminone structure is stabilized by a strong intra­molecular N—H...O=C hydrogen bond.

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The title compound, C21H17NO2, has been synthesized by the condensation of dibenzoyl­methane and 2-amino­phenol in the presence of p-TsOH. In the crystalline state, mol­ecules are linked by inter­molecular O—H...O=C hydrogen bonds which, in combination with intra­molecular N—H...O bonds, form centrosymmetric R22(14) dimers.
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