The HOMO of butadiene is the Highest Occupied Molecular Orbital, which happens to be sp2 hybridized orbitals.
see
http://www.bluffton.edu/~bergerd/classes/CEM311/examples/2p2trans.html
for some really descriptive photo representations and explanations on structure.
Homo Habili and Homo erectus
homo habiles first then homo erectus then homo sapien neanderthalensis then the homo sapien sapiens
There is some dispute about the "seven" names. However, we do have "homo sapiens", "homo neandertalensis", "homo heidlebergensis","archaic homo sapiens", "homo ergaster","homo erectus", and "homo habilis".
Homo sapien.
homo habilis
Because in homo-annular ring distance between C1 and C4(of butadiene structure in it) is less compare to C1 and C4 of heteroannular.So, in Homo-annular more overlap of pi system, more conjugation, more lamda max.
Butadiene is a hydrocarbon that is a gas an colorless. The chemical formula of butadiene is C4H6. Butadiene is formed as a byproduct of the steam cracking process.
Resonance structure of butadiene explains H2C. This is known as carbon and hydrogen.
Synthetic rubber.
Hans Palmgren has written: 'Investigations on polybutadiene rubber and some butadiene-styrene and butadiene-acrylonitrile copolymers' -- subject(s): Artificial Rubber, Butadiene, Polymers and polymerization
I'm looking for a supplier of hydroxy terminated butadiene polyols? Can anyone help me?
Butadiene is a non-corrosive gas that condenses to a liquid and is used to make polymers. Butadiene polymers include neoprene, styrene-butadiene rubber, and nitrile rubber.
butadiene
condoms
1. Buna-N: nitrile rubber, also known as , Perbunan, or NBR, is asynthetic rubber copolymer of acrylonitrile (ACN) and butadiene. Trade names include Nipol, Krynac and Europrene.Nitrile butadiene rubber (NBR) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene). Although its physical and chemical properties vary depending on the polymer's composition of nitrile, this form of synthetic rubber is generally resistant to oil, fuel, and other chemicals (the more nitrile within the polymer, the higher the resistance to oils but the lower the flexibility of the material).2. Buna S: a styrene-butadiene rubber
Styrene and 1,3-Butadiene.
A type of plastic such as Lego.