Acta Crystallographica Section C

Volume 67, Part 3 (March 2011)

organic compounds

lg3049 scheme

Acta Cryst. (2011). C67, o85-o88 [ doi:10.1107/S0108270111002836 ]

Novel hydrazone derivatives of 7-hydroxy-3',3'-dimethyl-3'H-spiro[chromene-2,1'-isobenzofuran]-8-carbaldehyde

A. Bulanov, I. N. Shcherbakov, L. D. Popov, E. Y. Shasheva, P. A. Belikov and Z. A. Starikova

Abstract: The structures of new oxaindane spiropyrans derived from 7-hydroxy-3',3'-dimethyl-3'H-spiro[chromene-2,1'-isobenzofuran]-8-carbaldehyde (SP1), namely N-benzyl-2-[(7-hydroxy-3',3'-dimethyl-3'H-spiro[chromene-2,1'-isobenzofuran]-8-yl)methylidene]hydrazinecarbothioamide, C₂₇H₂₅N₃O₃S, (I), at 120 (2) K, and N'-[(7-hydroxy-3',3'-dimethyl-3'H-spiro[chromene-2,1'-isobenzofuran]-8-yl)methylidene]-4-methylbenzohydrazide acetone monosolvate, C₂₇H₂₄N₂O₄·C₃H₆O, (II), at 100 (2) K, are reported. The photochromically active C_spiro-O bond length in (I) is close to that in the parent compound (SP1), and in (II) it is shorter. In (I), centrosymmetric pairs of molecules are bound by two equivalent N-HS hydrogen bonds, forming an eight-membered ring with two donors and two acceptors.

Formula: C₂₇H₂₅N₃O₃S and C₂₇H₂₄N₂O₄·C₃H₆O


	Structure factor file (CIF format) (202.8 kbytes) [ doi:10.1107/S0108270111002836/lg3049Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (223.8 kbytes) [ doi:10.1107/S0108270111002836/lg3049IIsup3.hkl ] Contains datablock II

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