Question

No hydrogen bonding is shown by​

Answer 1

Answer: No hydrogen bonding is shown by​ a hydrogen atom.

Explanation: Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as an N, O, or F atom and another very electronegative atom. Hydrogen bond strengths range from 4 kJ to 50 kJ per mole of hydrogen bonds.

• In molecules containing N-H, O-H or F-H bonds, the large difference in electronegativity between the H atom and the N, O or F atom leads to a highly polar covalent bond (i.e., a bond dipole). The electronegativities are listed below.    

element                                                              electronegativity value

H                                                                                    2.1

N                                                                                    3.0

O                                                                                    3.5

F                                                                                    4.1

Because of the difference in electronegativity, the H atom bears a large partial positive charge and the N, O or F atom bears a large partial negative charge.