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A new crystal structure of 3,6-diphenylpyrrolo[3,4-c]pyrrole-1,4-dithione

✍ Scribed by Mizuguchi, J. ;Arita, M. ;Rihs, G.

Book ID: 114508361
Publisher: International Union of Crystallography
Year: 1991
Tongue: English
Weight: 586 KB
Volume: 47
Category: Article
ISSN: 0108-2701
DOI: 10.1107/s0108270191002639

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## Abstract The title compound is a mono-thionated derivative of the diketopyrrolopyrrole red-pigment on the market. The crystal data are: C~18~H~12~N~2~OS, __M__ ~r~ = 304.37, monoclinic, __P__2~1~/__n__, __a__ = 7.570(3) Å, __b__ = 4.869(3) Å, __c__ = 19.616(4) Å, __β__ = 99.07(3)°, __V__ = 714.0

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Some time ago we became interested in the synthesis of derivatives of Z-azetlnone (1). a lactam analogue of the "antiaromatic" hydrocarbon, cyclobutadiene. It seemed possible that a modification of the Reformatskii reaction, already used for the synthesis of Z-azetidinones, or g-lactams, 1 might y

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