# Homework Help: $BeCl_2$ and his brother $BeH_2$

1. May 4, 2015

### mooncrater

1. The problem statement, all variables and given/known data
There was a question about $BeCl_2$ and $BeH_2$ which had a statement :
" Both have similar structure but different bonding. "
Which was marked correct.

2. Relevant equations

3. The attempt at a solution
The problem I am facing is that in the solution dotted lines are given between the B-H bond and solid arrows ($\longrightarrow$) for the B-Cl bond. So do those represent a hydrogen bond and a coordinate bond respectively?

2. May 4, 2015

### Raghav Gupta

First hydrogen bond is for some specific atoms. What are those ?

3. May 4, 2015

F, O and N.

4. May 4, 2015

### Raghav Gupta

So what does it imply to your attempt?

5. May 4, 2015

### mooncrater

It doesn't form hydrogen bonds.... so is it a covalent one?

6. May 5, 2015

### Raghav Gupta

Both BeCl2 and BeH2 are covalently bonded.
The main difference is one exists as a polymer.
The atom having lone pair can form dative or coordination bonds.