What stereochemistry do you expect for the alkene obtained by e2 elimination of (1r,2r)-1,2-dibromo-1,2-diphenyleth ane? draw a newman projection of the reacting conformation.

Z-isomer of the alkene is formed.

Explanation:

E2 elimination occurs in the presence of a strong base. It is a bimolecular elimination reaction in which the rate depends both on the concentration of the alkyl halide and the base.

The elimination reaction occurs in a single step. For E2 to happen, Hydrogen at the α-C and the halogen must be anti periplanar to each other or the angle between them is equals to 180°.

The reaction of (1R,2R) -1,2-dibromo-1,2-diphenylethane with a strong base gives (Z)-1-bromo-1,2-diphenylethene. The mechanism is shown in image one. Z-isomer of the alkene is formed.

The Newman projection of the reacting conformation is shown in image 2.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)