4-Oxatricyclo[5.2.1.0^2,6]dec-8-en-3,5-dion

The Nadic Anhydride, with the CAS registry number 826-62-0 and EINECS registry number 204-957-7, has the systematic of 3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione. And the molecular formula of this chemical is C₉H₈O₃. It belongs to the product category of Norbornene Derivatives.

The physical properties of Nadic Anhydride are as following: (1)# of Rule of 5 Violations: 0; (2)ACD/BCF (pH 5.5): 1; (3)ACD/BCF (pH 7.4): 1; (4)ACD/KOC (pH 5.5): 20.96; (5)ACD/KOC (pH 7.4): 20.96; (6)#H bond acceptors: 3; (7)#H bond donors: 0; (8)#Freely Rotating Bonds: 0; (9)Polar Surface Area: 43.37 Ų; (10)Index of Refraction: 1.584; (11)Molar Refractivity: 39.08 cm³; (12)Molar Volume: 116.78 cm³; (13)Polarizability: 15.493×10^-24cm³; (14)Surface Tension: 50.991 dyne/cm; (15)Density: 1.406 g/cm³; (16)Flash Point: 163.801 °C; (17)Enthalpy of Vaporization: 57.369 kJ/mol; (18)Boiling Point: 331.056 °C at 760 mmHg; (19)Vapour Pressure: 0 mmHg at 25°C.

Uses of Nadic Anhydride: It can react with ethanol to produce (+-)-norborn-5-ene-2endo,3endo-dicarboxylic acid monoethyl ester. The reaction time is 3 hours with heating, and the yield is about 83%.

You should be cautious while dealing with this chemical. It has risk of serious damage to eyes, and may cause sensitization by inhalation and skin contact. Therefore, you had better take the following instructions: Wear suitable gloves and eye/face protection, and in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice; Do not breathe dust; Avoid contact with skin.

You can still convert the following datas into molecular structure:
(1)SMILES: C1C2C=CC1C3C2C(=O)OC3=O
(2)InChI: InChI=1/C9H8O3/c10-8-6-4-1-2-5(3-4)7(6)9(11)12-8/h1-2,4-7H,3H2
(3)InChIKey: KNDQHSIWLOJIGP-UHFFFAOYAJ