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2'-Eth-oxy-1,3,3-trimethyl-spiro-[indoline-2,3'-3H-naphtho-[2,1-b][1,4]oxazine].

ABSTRACT: In the title compound, C(24)H(24)N(2)O(2), the five-membered ring of the indoline ring system adopts an envelope conformation with the spiro C atom at the flap. The dihedral angle between the benzene ring of the indoline ring system and the naphthalene ring system is 71.70 (7)°. In the crystal structure, pair of weak C-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers.

SUBMITTER: Lin J

PROVIDER: S-EPMC3006916 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-{[(Biphenyl-2-yl)diazen-yl]methyl-idene}-1,3,3-trimethyl-indoline.

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Crystal structure determination as part of an undergraduate laboratory experiment: 1',3',3'-tri-methyl-spiro-[chromene-2,2'-indoline] and 1',3',3'-trimethyl-4-[(<i>E</i>)-(1,3,3-tri-methyl-indolin-2-yl-idene)meth-yl]spiro-[chroman-2,2'-indoline].

Project description:The crystal structures of the title compounds, C19H19NO and C31H34N2O, were determined as part of an experiment in an undergraduate teaching laboratory that demonstrates the relationship between mol-ecular structure and function. 1',3',3'-Tri-methyl-spiro-[chromene-2,2'-indoline] is both a photoswitch and thermochromic mol-ecule. Students synthesized it and a bis-indoline adduct and compared the crystallographically determined structures to computed gas-phase models.

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Project description:In the crystal structure of the title compound, C(19)H(17)Cl(2)NO, the indoline and benzopyran ring systems are approximately perpendicular to each other. The indoline ring is in an envelope conformation with the spiro C atom as the flap. The N atom of the indoline ring forms a pyramidal environment, the sum of the angles at this atom being 352.46°.

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Project description:In the title compound, C(14)H(18)ClNS, the 2,3-dihydro-1,3-thia-zole ring adopts an envelope with the S,N-bound C atom at the flap and the cyclo-hexane ring adopts a chair conformation. In the crystal, N-H⋯S hydrogen bonds with C(5) motifs connect the mol-ecules into chains parallel to the c axis.

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Project description:In the title compound, C(18)H(19)NO(2), the five-membered ring of the indane fragment adopts an envelope conformation with the unsubstituted carbon atom at the flap displaced by 0.412 (3) Å from the plane formed by the other four atoms. The nitro group forms a dihedral angle of 5.3 (2)° with the indane benzene ring while the dihedral angle between the phenyl ring and the indane benzene ring is 76.74 (9)°.

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