9-(2-Methylphenyl)-3,4,5,6,9,10-hexa- hydroxanthene-1,8(2H,7H)-dione |
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| Authors: | Marco Brito-Arias Manuel Tapia-Albarrán Itzia Padilla-Martínez Francisco Martínez-Martínez Georgina Espinosa Elies Molins Enrique Espinosa |
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| Institution: | (1) Unidad Profesional Interdisciplinaria de Biotecnología-IPN, Av. Acueducto s/n Col. Barrio la Laguna Ticomán, CP 07340 México DF, México;(2) Instituto de Química-UNAM, Circuito Exterior Ciudad Universitaria Coyoacán, 04510 México DF, México;(3) Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Spain |
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| Abstract: | Several 9-(2-R phenyl)xanthenediones have been synthesized and the x-ray diffraction structure for the 2-methylphenyl derivative (4b) has been determined. This compound crystallizes in the monoclinic system, space group P21/n, with a = 11.729 (3), b = 9.674 (3), c = 14.628 (4) Å, and  = 106.30°. It presents a partially hydrogenated xanthene system in distorted boat conformation for the heterocyclic central ring, and an almost ideal envelope conformation for the outer rings. The aromatic substituent at the ninth position is at 84° in angle with the xanthene system. |
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| Keywords: | X-ray diffraction xanthenedione heterocyclic fused rings |
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