T7 Flashcards
(11 cards)
What is empirical formula?
The simplest ratio of atoms of each element in a compound.
What are structural isomers?
Molecules with the same molecular formula but different structural formula.
What are stereoisomers?
Molecules with the same structural formula but a different arrangement of atoms in space.
Two things about E/Z isomerism:
Restricted rotation around carbon-carbon double bond, different groups attached to each carbon of double bond.
General formula of alkanes:
CnH2n+2
What are fractions?
A group of hydrocarbons with similar boiling points.
What is cracking?
A process where larger alkanes are broken down into smaller and more useful alkanes plus alkenes.
What does catalytic cracking require & produce?
Uses zeolite cracking, pressure and temperature of 450 degrees. Produces: aromatic hydrocarbons and branched alkanes.
What does thermal cracking require & produce?
High temperature (1000 degrees) and pressure (70atm). Produces lots of alkenes which make polymers.
What is a free radical?
A species with an unpaired electron, indicated by a dot.
What are the 3 stages of free radical substitution:
Initiation, propagation and termination.
