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G. Kollenz, C. O. Kappe and H. A. El Nabey, “On the Reac- tion of 2,2,6,6-Tetramethyl-3,5-heptanedione (‘Dipivaloyl- methane’) with Oxalyl Chloride,” Heterocycles, Vol. 32, No. 4, 1991, pp. 669-673. doi:10.3987/COM-91-5679

has been cited by the following article:

• TITLE: Crystal and Molecular Structure of 4-Benzoyl-1,5-diphenyl-1H-pyrazole-3-carbonitrile

  AUTHORS: E. Korkusuz, E. Şahin, İ. Yildirim

  KEYWORDS: Pyrazole-3-Carbonitrile; 2, 3-Furandione; Single Crystal Structure; X-Ray Diffraction; IR; NMR Spectra

  JOURNAL NAME: Crystal Structure Theory and Applications, Vol.1 No.1, June 29, 2012

  ABSTRACT: The crystal structure of potential active 4-benzoyl-1,5-diphenyl-1H*-pyrazole-3-carbonitrile (C23H15N3O) (I) has been determined from single crystal X-ray diffraction data. Also IR, Uv-vis and NMR spectral data were determined. The title compound crystallizes in the monoclinic space group P* 21/c, with a* = 9.3167(2), b* = 20.6677(3), c* = 10.6143(3) ?, β* = 112.665(3)°, V* = 1886.00(8) ?3, Dcalc* = 1.23g cm-3, Z* = 4. In the structure, intermolecular H*-bonds lead to the formation of a centrosymmetric dimmer of the molecule. Furthermore, the compound has a wide transmission window (300 to 1100 nm) with a transparency of nearly 100% and the UV cut-off wavelength occurs at 242 nm.