Topic
Xanthene
About: Xanthene is a research topic. Over the lifetime, 2132 publications have been published within this topic receiving 34803 citations. The topic is also known as: Xanthene & dibenzo[a,e]pyran.
Papers published on a yearly basis
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TL;DR: In this paper, the triclinic P1̅ (no. 2), a = 7.009(3) Å, b = 8.081(3)-Å, c = 15.218(8) ǫ, α = 101.973(9)°, β = 99.137(10)° and γ = 102.164(7)°.
Abstract: Abstract C19H19NO6, triclinic, P1̅ (no. 2), a = 7.009(3) Å, b = 8.081(3) Å, c = 15.218(8) Å, α = 101.973(9)°, β = 99.137(10)°, γ = 102.164(7)°, V = 805.5(6) Å3, Z = 2, Rgt(F) = 0.0520, wRref(F2) = 0.1271, T = 296(2) K.
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TL;DR: The structure 9-(4-hydroxyphenyl)xanthene is proposed for A274, an extensively conjugated phenol recently shown to be present as a common trace constituent in randomly selected batches of commercial tissue culture media.
Abstract: An extensively conjugated phenol (A274), recently shown to be present as a common trace constituent in randomly selected batches of commercial tissue culture media, was diazomethylated; the monomethyl derivative so prepared was shown to exhibit gas chromatographic and mass spectrometric properties identical to those observed for synthetically prepared 9-(4-methoxyphenyl)xanthene, but different from those of several isomeric compounds. The structure 9-(4-hydroxyphenyl)xanthene is thus proposed for A274.
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TL;DR: In this paper, the title compound, C22H16O4, is composed of six rings bridged via two chiral C atoms, and a couple of enantiomers cocrystallize to give a racemic crystal in which the O-H⋯O hydrogen bonds connect the enantiomer alternately to form a chain.
Abstract: The title compound, C22H16O4, is composed of six rings bridged via two chiral C atoms. A couple of enantiomers cocrystallize to give a racemic crystal in which the O—H⋯O hydrogen bonds connect the enantiomers alternately to form a chain. π–π interactions play an important role in crystal packing to control the parallel arrangement of the chains.
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TL;DR: The hydrogen-abstraction reaction of 9,10-anthraquinone (AQ) from xanthene has been investigated by the CIDEP and CIDNP methods as discussed by the authors.
Abstract: The hydrogen-abstraction reaction of 9,10-anthraquinone (AQ) from xanthene has been investigated by the CIDEP and CIDNP methods. The CIDNP spectrum is explained by a radical-pair mechanism, but a triplet mechanism contributes to the CIDEP spectrum. The products of AQ with xanthene are discussed.