What is the HNC bond angle in CH2NH2?

Answer 1

The methylene radical CH2 has just 6 electrons around the central carbon. The lowest energy methylene is "triplet" methylene with two unpaired electrons. Simple VSEPR cannot predict the bond angle which is measured as being 133 0. A slightly higher energy form has no unpaired electrons and the angle is measured at 102 0. This is in accord with simple VSEPR theory which would predict a decrease in bond angle from 120 0 due to repulsion of the lone pair.

In compounds the -CH2- unit in alkanes such as propane the bond angles are close to 109 0 the tetrahedral angle (sp3 hybridisation). When =CH2 terminates an alkene such as ethene (ethylene) the bond angle is close to 120 0, (sp2 hybridisation)

Answer 2

The bond angle for H-N-C in CH2NH2 is approximately 109.5 degrees, which is close to the ideal tetrahedral angle for sp3 hybridized atoms.

Answer 3

180 degrees,because the molecular and bonding geometry are both "linear"

Answer 4

Less than 109.5, because normally in an NH2- molecule, the bond angle is 107.

Answer 5

114.4 degrees

Answer 6

107

Answer 7

120 degrees