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2-(Naphthalen-1-yl)-4-(naphthalen-1-yl-methyl-idene)-1,3-oxazol-5(4H)-one.

ABSTRACT: In the title compound, C(24)H(15)NO(2), the oxazole ring is oriented at dihedral angles of 10.09?(4) and 6.04?(4)° with respect to the mean planes of the naphthalene ring systems, while the two naphthalene ring systems make a dihedral angle of 4.32?(3)°. Intra-molecular C-H?N hydrogen bonds link the oxazole N atom to the naphthalene ring systems. In the crystal, inter-molecular weak C-H?O hydrogen bonds link the mol-ecules into centrosymmetric dimers. ?-? contacts between the oxazole and naphthalene rings and between the naphthalene ring systems [centroid-centroid distances = 3.5947?(9) and 3.7981?(9)?Å] may further stabilize the crystal structure. Three weak C-H?? inter-actions also occur.

SUBMITTER: Gundogdu C

PROVIDER: S-EPMC3089157 | biostudies-literature | 2011 May

REPOSITORIES: biostudies-literature

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2-(Naphthalen-1-yl)-4-(naphthalen-1-yl-methyl-idene)-1,3-oxazol-5(4H)-one.

Gündoğdu Cevher C Alp Serap S Ergün Yavuz Y Tercan Barış B Hökelek Tuncer T

Acta crystallographica. Section E, Structure reports online 20110429 Pt 5

In the title compound, C(24)H(15)NO(2), the oxazole ring is oriented at dihedral angles of 10.09 (4) and 6.04 (4)° with respect to the mean planes of the naphthalene ring systems, while the two naphthalene ring systems make a dihedral angle of 4.32 (3)°. Intra-molecular C-H⋯N hydrogen bonds link the oxazole N atom to the naphthalene ring systems. In the crystal, inter-molecular weak C-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers. π-π contacts between the oxazole and naphtha ...[more]

PMID: 21754548

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2-(Naphthalen-1-yl)-4-(thio-phen-2-yl-methyl-idene)-1,3-oxazol-5(4H)-one.

Project description:The asymmetric unit of the title compound, C(18)H(11)NO(2)S, contains two crystallographically independent mol-ecules. In one mol-ecule, the oxazole and thio-phene rings are oriented at dihedral angles of 17.40?(9) and 18.18?(7)° with respect to the naphthalene ring system, while the oxazole and thio-phene rings are oriented to each other at a dihedral angle of 0.86?(9)°. In the other mol-ecule, the corresponding angles are 3.05?(8), 9.62?(6) and 7.02?(8)°, respectively. In each mol-ecule, a weak intra-molecular C-H?N hydrogen bond links the oxazole N atom to the naphthalene group. Weak inter-molecular C-H?O hydrogen bonding is present in the crystal structure. ?-? stacking between the oxazole and thio-phene rings, between the thio-phene and naphthalene rings, and between the oxaozole and naphthalene rings, [centroid-centroid distances = 3.811?(2), 3.889?(2), 3.697?(2) and 3.525?(2)?Å] may further stabilize the crystal structure.

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4-[(Dimethyl-amino)methyl-idene]-2-(4-nitro-phen-yl)-1,3-oxazol-5(4H)-one.

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Project description:The central aza-lactone ring in the title compound, C(18)H(15)NO(4), is planar (r.m.s. deviation 0.05, 0.12?Å) in both independent mol-ecules comprising the asymmetric unit. The benzyl-idene substituent is coplanar with this ring [dihedral angle between the planes = 1.8?(1)° in the first mol-ecule and 2.8?(1)° in the second], as is the phenyl substitutent [dihedral angle between rings = 4.6?(1) and 9.7?(1)°, respectively].

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4-[(2,4-Dimethyl-1,3-oxazol-5-yl)meth-yl]-4-hydr-oxy-2-methyl-isoquinoline-1,3(2H,4H)-dione.

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