471-84-1

Basic information

• Product Name: Bicyclo2.2.1heptane, 7,7-dimethyl-2-methylene-
• Synonyms: Bicyclo2.2.1heptane, 7,7-dimethyl-2-methylene-;Bicyclo[2.2.1]heptane,7,7-;2-Methylene-7,7-dimethylbicyclo[2.2.1]heptane;7,7-Dimethyl-2-methylenenorbornane
• CAS NO: 471-84-1
• Molecular Formula: C₁₀H₁₆
• Molecular Weight: 136.23
• Mol File: 471-84-1.mol
• Article Data: 7

Chemical Properties

• Melting Point: 142-143 °C
• Boiling Point: 158.6°Cat760mmHg
• Flash Point: 34.9°C
• Appearance: /
• Density: 0.88g/cm³
• CAS DataBase Reference: Bicyclo2.2.1heptane, 7,7-dimethyl-2-methylene-(CAS DataBase Reference)
• NIST Chemistry Reference: Bicyclo2.2.1heptane, 7,7-dimethyl-2-methylene-(471-84-1)
• EPA Substance Registry System: Bicyclo2.2.1heptane, 7,7-dimethyl-2-methylene-(471-84-1)

Safety Data

• Hazardous Substances Data: 471-84-1(Hazardous Substances Data)

Usage

General Description

Bicyclo[2.2.1]heptane, 7,7-dimethyl-2-methylene- is a chemical compound with a bicyclic structure consisting of two fused cyclopropane rings. It is also known as norcarane and is a colorless liquid with a pungent odor. Bicyclo2.2.1heptane, 7,7-dimethyl-2-methylene- is primarily used as a building block in the synthesis of various organic compounds, including pharmaceuticals and agrochemicals. It is also used as a flavoring agent in the food industry. Bicyclo[2.2.1]heptane, 7,7-dimethyl-2-methylene- is considered to be relatively stable under normal conditions but may react violently with oxidizing agents. It is important to handle this compound with caution and in a well-ventilated area.

Upstream product

• 80-56-8 Pinene 
• 763-10-0 geranyl diphosphate 
• 22425-99-6 2,7,7-trimethyl-endo-2-norbornyl p-nitrobenzoate 
• 22425-99-6 2,7,7-trimethyl-exo-2-norbornyl p-nitrobenzoate 
• 78672-59-0 (1,3,3-Trimethyl-bicyclo[2.2.1]hept-2-ylidene)-methanone 

Downstream Products

• 4183-87-3 7,7-dimethylbicyclo<2.2.1>heptane-2,3-dione 
• 514-02-3 2,7,7-trimethyl-endo-2-norbornanol 
• 514-02-3 2,7,7-trimethyl-exo-2-norbornanol 
• 514-15-8 camphor 
• 91057-07-7 7,7-dimethyl-norbornane-2-carboxylic acid 
• 103273-24-1 7,7-dimethyl-norbornane-2-carbaldehyde 
• 1125-16-2 7,7-dimethyl-2-methylene-bicyclo(2.2.1)heptane epoxide 

Relevant articles and documents

Supported H4SiW12O40 catalysts for α-pinene isomerization

The heterogeneous isomerization of α-pinene was studied at 100, 130 and 160°C using 10% supported H4SiW12O40 (SiW) on SiO2, TiO2 and HZSM-5. The effect of the reaction temperature and the concentratio

Generation of acid sites on silica-supported rare earth oxide catalysts: Structural characterization and catalysis for α-pinene isomerization

Silica-supported rare earth oxide catalysts (Ln/SiO2; Ln = La, Ce, Pr, Sm, Eu, Tb, Yb and Y), loading amounts of which were 3.4 mmol g (support)- 1, were characterized by α-pinene isomerization, temperature-programmed desorption (TPD), Fourier transform infrared (FTIR), X-ray diffraction (XRD), X-ray absorption fine structure (XAFS), thermogravimetric-differential thermal analysis (TG-DTA) and Raman spectroscopy. In the lanthanoid series, the catalytic activity increased with atomic number from 57La to 70Yb, except for Ce. All the Ln/SiO2 catalysts, except for Ce, were amorphous. On the surface of the catalyst, Ln-O-Si and Ln-O-Ln linkages formed, the ratio of which varied with the loaded element. The ratio of Ln-O-Si linkage increases with stronger affinity among LnO(n) units and SiO4 tetrahedra, and the affinity depends on the size of Ln3+. With increasing ratio of Ln-O-Si to Ln-O-Ln linkage, the catalytic activity increases. Silica-supported yttrium oxide catalyst, the trivalent ion radius of which is quite similar to that of ytterbium, exhibited the same activity as that of Yb/SiO2. Raman spectroscopic characterization revealed that excess loading of Yb atoms on SiO2-support block Yb-O-Si linkage to form Yb2O3 fine particles. When Yb/SiO2 was pretreated at 1273 K, fine ytterbium silicate crystallites formed. Ln-O-Si linkage without a long-ranged ordering structure was the active site for α-pinene isomerization.

Acidic property of FSM-16

Siliceous FSM-16 possesses acid sites to catalyze but-1-ene isomerization to produce but-2-ene (cis/trans = 1.4-1.7) at 323 K and 2,6,6- trimethylbicyclo[3.1.1]hept-2-ene (α-pinene) isomerization at 303 K. Catalytic activity was dependent upon heat treatment and reached a maximum at 673 K. The maximum acid strength was invariably H0 = -3.0 independent of the pretreatment temperatures. The acidity was much reduced by calcination at higher temperatures, but restored by water treatment at 353 K as long as the FSM-16 retained its structure.