Title: 3-Carene
CAS Registry Number: 13466-78-9
CAS Name: 3,7,7-Trimethylbicyclo[4.1.0]hept-3-ene
Additional Names: D3-carene; 4,7,7-trimethyl-3-norcarene; isodiprene
Molecular Formula: C10H16
Molecular Weight: 136.23
Percent Composition: C 88.16%, H 11.84%
Literature References: Constituent of turpentine. The turpentine from Pinus sylvestris L. may contain as much as 42%, turpentine from Pinus longifolia Roxb., Pinaceae about 30%. Isoln and structure: Simonsen, The Terpenes vol. II (Cambridge, 1949) pp 64-72; Guenther, The Essential Oils vol. II (Van Nostrand, 1949) pp 49-51. Conformation: Acharya, Tetrahedron Lett. 1966, 4117. Absorption spectrum: Cole, J. Chem. Soc. 1954, 3807.
Derivative Type: d-Form
Properties: Mobile liquid. Readily oxidized on exposure to air. Sweet and pungent odor, more agreeable than the odor of turpentine. d1515 0.8668; d3030 0.8586. bp705 168-169°. bp200 123-124°. [a]D20 +7.69°. nD30 1.468. Practically insol in water. Miscible with fat solvents and oils.
Boiling point: bp705 168-169°; bp200 123-124°
Optical Rotation: [a]D20 +7.69°
Index of refraction: nD30 1.468
Density: d1515 0.8668; d3030 0.8586
Derivative Type: d-Form nitrosate
Molecular Formula: C10H16N2O4
Molecular Weight: 228.25
Percent Composition: C 52.62%, H 7.07%, N 12.27%, O 28.04%
Properties: Prepd from d-D3-carene with amyl nitrite, acetic and nitric acid, prisms, dec 147.5°.

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