# Which has greater N-O bond length: NO or NOCl?

I came across this question. According to me, $$\ce{NO}$$ should have a shorter bond length as it has a triple bond, while $$\ce{NOCl}$$ has a double bond. But the answer is given that $$\ce{NO}$$ has greater bond length than $$\ce{NOCl}$$. Why? Is the answer wrong

• Given the data on Wikipedia NO 115 pm, NOCl 114 pm, there is hardly a difference (I did not cross-validate these values, but I'd say they are essentially the same). Could you please point to the source of this question. – Martin - マーチン Apr 8 '19 at 11:43
• The data I found is 115.08+/-0.005 for NO (Herzberg, Diatomic) and 114+/- 2 for NOCl (Cotton & Wilkinson, Inorg Chem) and from this data it is uncertain which NO bond length is greater. – porphyrin Apr 8 '19 at 12:16
• I think that $\ce{NO}$ bond order is 2.5 and $\ce{NOCl}$ exist as $\ce{NO+}$ and $\ce{Cl-}$ and $\ce{NO+}$ has bond order 3 that is why $\ce{N-O}$ bond length in $\ce{NOCl}$ is shorter. – immortalhero gamer Aug 27 '20 at 3:33

$$\ce{NOCl}=196\text{ pm}$$ Wikipedia
$$\ce{NCl3}=176\text{ pm}$$ Wikipedia