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
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.