Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 88-99-3, Name is Pathalic acid, molecular formula is C8H6O4. In an article, author is Maftei, Dan,once mentioned of 88-99-3, Category: phthalazines.
The X-ray crystal structure of 8-(4-methylbenzoyl)benzo[5,6]isoindolo[1,2-a]phthalazine-9,14-dione, a derivative of fused pyrrolophtalazine heterocycle, is reported. The compound crystallfzes in the monoclinic C2/c space group (no. 15) with a = 23.968(4) angstrom, b = 7.6709(14) angstrom, c = 22.353(3) angstrom, alpha = gamma = 90.00, beta = 110.680(15)degrees, V=3845 angstrom(3) and Z = 7. Molecular and crystal packing parameters for the novel heterocyclic system were obtained from intensity data collected at room temperature. Both the benzo [5,6]isoindolo [1,2-a]phthalazine-9,14-dione and the 4-methyl-benzoyl fragments are planar and oriented at 78 degrees. Crystal packing is based on multiple (strong) pi-pi stacking interactions.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem