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MSDS for benzene is available at AMOCO. ... Bond energy? Bond length: 1.39 Å C-C [1] Molecular geometry: 120 °C–C–C 120° H–C–C Magnetic susceptibility?
English: Bond lengths and angles of benzene and different group 15 heterobenzenes (from left to right: benzene, pyridine, phosphabenzene, arsabenzene, stilbabenzene, and bismabenzene) Date 25 April 2010
The existence of a very long C–C bond length of up to 290 pm is claimed in a dimer of two tetracyanoethylene dianions, although this concerns a 2-electron-4-center bond. [4] [5] This type of bonding has also been observed in neutral phenalenyl dimers. The bond lengths of these so-called "pancake bonds" [6] are up to 305 pm.
Benzene is a natural constituent of petroleum and is one of the elementary petrochemicals. Due to the cyclic continuous pi bonds between the carbon atoms, benzene is classed as an aromatic hydrocarbon. Benzene is a colorless and highly flammable liquid with a sweet smell, and is partially responsible for the aroma of gasoline.
where V=257.7 Å −2 is the normalization value, n is the number of carbon–carbon bonds, and d are bond lengths (d opt =1.388 Å is the optimum value and d i are the observed or computed values). References
The average length of a C–C single bond is 154 pm; that of a C=C double bond is 133 pm. In localized cyclohexatriene, the carbon–carbon bonds should be alternating 154 and 133 pm. Instead, all carbon–carbon bonds in benzene are found to be about 139 pm, a bond length intermediate between single and double bond.
For example, (η 5 –cyclopentadienyl) 2 Cr (ML 4 X 2) and (η 6 –benzene) 2 Cr (ML 6) both have a LBN of 6 as compared to classical coordination numbers of 10 and 12. [3] Well known complexes such as Ferrocene and Uranocene also serve as examples where LBN and coordination number differ.
Comparison of bond lengths in simple hydrocarbons [5] Molecule Ethane: Ethylene: Acetylene: Formula C 2 H 6: C 2 H 4: C 2 H 2: Class alkane: alkene: alkyne: Structure Hybridisation of carbon sp 3: sp 2: sp C-C bond length 153.5 pm: 133.9 pm: 120.3 pm: Proportion of C-C single bond 100% 87% 78% Structure determination method microwave ...