NOCl is called nitrosyl chloride. First we need to count the total number of valence electrons. We just add the valence electrons of each atoms involved.

N = 5

Cl = 7

O = 6

------------

    18 electrons

Next, we have to assign the central atom; In this case it is N.

Now we have to connect the atoms and form a bond. We can form one N-Cl bond and one N=O bond

  Cl - N = O

Finally, we have to distribute The remaining electrons on Br and N provided that it follows the octet rule. 

    ..    ..    ..

: Cl  - N = O

   ''            '' 

NOCl has a geometry of bent. The angle is 120 degrees.