- 20.5.6: Draw arrows to show the movement of electrons in going from one res...
- 20.5.7: When pyrrole is added to a dilute solution of D 2 SO 4 in D 2 O, 2-...
- 20.5.8: Explain why cyclopentadiene ( pKa = 15 ) is more acidic than pyrrol...
Solutions for Chapter 20.5: Aromatic Five-Membered-Ring Heterocycles
Full solutions for Organic Chemistry | 7th Edition
The resonancestabilized, cationic intermediate of a Friedel-Crafts acylation, formed by treating an acyl halide with aluminum trichloride.
At constant pressure and temperature, the volume of a gas is directly proportional to the number of moles of the gas present. (5.3)
base ionization constant (Kb).
The equilibrium constant for the base ionization. (15.6)
The enthalpy change, ?H, required to break a particular bond when the substance is in the gas phase. (Section 8.8)
The experimental measurement of heat produced in chemical and physical processes. (Section 5.5)
A model of reaction rates based on the idea that molecules must collide to react; it explains the factors influencing reaction rates in terms of the frequency of collisions, the number of collisions with energies exceeding the activation energy, and the probability that the collisions occur with suitable orientations. (Section 14.5)
A technique by which compounds are separated from each other based on a difference in the way they interact with the medium (the adsorbent) through which they are passed.
In an acid-base reaction, the product that results when an acid is deprotonated.
An ArN2 1 or RN2 1 ion
The spreading of one substance through a space occupied by one or more other substances. (Section 10.8)
Stereoisomers that are nonsuperposable mirror images of each other; refers to a relationship between pairs of objects
Energetic electromagnetic radiation emanating from the nucleus of a radioactive atom. (Section 21.1)
glass transition temperature (Tg)
The temperature at which noncrystalline polymers become very soft.
An equation that is often employed to calculate the pH of buffered solutions: pH = pKa + log 3conjugated base4 3acid4
A Lewis base bonded to a metal atom in a coordination compound. It may bond strongly or weakly.
A compound in which one or more OH groups, and possibly additional oxygen atoms, are bonded to a central atom. (Section 16.10)
A reaction that takes place in a single step, without intermediates, and involves a cyclic redistribution of bonding electrons
The arrangement of elements in order of increasing atomic number, with elements having similar properties placed in vertical columns. (Section 2.5)
pi (p) bond
A bond formed from adjacent, overlapping p orbitals.
Polymers that are formed under conditions in which the individual monomers react with each other to form oligomers, which are then joined together to form polymers.