Acta Cryst. (2010). E66, o1504  [ doi:10.1107/S1600536810015126 ]

2-[(2,4-Dihydroxybenzylidene)amino]-3',6'-bis(ethylamino)spiro[isoindoline-1,9'-xanthen]-3-one

Z.-H. Xu, Y.-L. Zhang, Y.-R. Zhao and F.-L. Yang

Abstract: The title compound, C₃₅H₃₆N₄O₄, was prepared as a spirolactam ring formation of rhodamine B dye for comparison with a ring-opened form. The xanthene ring system is approximately planar. The r.m.s. deviation from planarity is 0.064 (6) Å for the xanthene ring. The dihedral angles formed by the spirolactam and 2,4-dihydroxybenzene rings with the xanthene ring system are 86.6 (9) and 88.0 (9)°, respectively.

Online 29 May 2010

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