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- W1994187188 abstract "Abstract The phase diagram for the binary system phenothiazine and phenazine has been examined and found to demonstrate the existence of a 1:1 phase. Crystals fo this phase are dark red in color and display a visible absorpiton spectrum which seems indicative of a π-molecular donor: acceptor complex. A crystal structure determination has been carried out; space group PC1/c: a = 9.072(2), b = 8.872(2), c = 25.934(5) Å, β = 112.65(2)°, and Z = 4. The crystal structure reverals interactions between the components that differ markedly from those commonly observed for weak π-molecular donor: acceptor complexs. Instead of the infinite stacks of alternating donor and acceptor molecules, the phenothiazine and phenazine molecules are nearly mutually perpedicular. There is an intermolecular hydrogen bond in which the phenothiazine molecule serves as the donor. A center of inversion gives rise to “dimer” in which the two phenazine molecules are stacked swith their mean planes separated by 3.714 Å. Any induced polarizatin resulting from the intermolecular hydrogen bonding in monomer is balanced by summetry in the dimer. Consequenlty, the dimer may be appropriately regarded as the crystallographic packing unit." @default.
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- W1994187188 date "1983-01-01" @default.
- W1994187188 modified "2023-09-23" @default.
- W1994187188 title "Characterization of a 1:1 Complex of Unusual Structure in the Binary Phenothiazine: Phenazine System" @default.
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- W1994187188 doi "https://doi.org/10.1080/15421408308084260" @default.
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