α-Costic anhydride

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α-Costic anhydride

THE TITLE COMPOUND [SYSTEMATIC NAME: 2-(4a,8-dimethyl-1,2,3,4,4a,5,6,8a-octa-hydro-naphthalen-2-yl)acrylic acid anhydride], C(30)H(42)O(3), is a new isocostic anhydride which was synthesized from the aerial part of Inula Viscosa- (L) Aiton [or Dittrichia Viscosa- (L) Greuter]. The mol-ecule adopts an essentially linear shape with two terminal fused-rings bridged by the anhydride group. The exte...

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The Chemical Modification of α-Amylase from Locale Bacteria of Bacillus subtilis ITBCCB148 using Citraconic Anhydride

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Bis(phenyl­phospho­nic) anhydride

The asymmetric unit of the title compound, C(12)H(12)O(5)P(2), contains four independent mol-ecules, generating two dimers via pairs of inter-molecular O-H⋯O hydrogen bonds, forming R(2) (2)(8) rings. The two aryl rings of each mol-ecule form dihedral angles of 108.6 (1), 103.2 (1), 12.5 (2) and 8.1 (2)° in the four mol-ecules.

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N-Phenyl­anthranilic anhydride

The complete mol-ecule of the title compound, C(26)H(20)N(2)O(3), is generated by crystallographic twofold symmetry, with the central O atom lying on the rotation axis. The conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond. The dihedral angle between the inner and outer aromatic ring planes is 61.12 (5)°.

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cis-epoxyhexahydrophthalic anhydride

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ژورنال

عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online

سال: 2010

ISSN: 1600-5368

DOI: 10.1107/s1600536810005064