Why nitrogen tri halides are not stable?

It is because of the small size and high electronegativity of nitrogen. Nitrogen has very small size as compared to the halogens, which have much larger sizes. Due to this, they can not remain bonded to the nitrogen atom and hence are highly unstable.

What is a Pentahalide?

Filters. (chemistry) Any halide containing five halogen atoms.

What are trihalides?

A trihalide in chemistry is an organohalide consisting of three halide atoms bonded to a single atom or compound. An example of a trihalide is chloroform. The trihalomethanes are the simplest trihalides, because only one hydrogen is connected to the carbon.

Why Pentahalides are more reactive than trihalides?

The oxidation state of +5 in pentahalides is more as compared to +3 oxidation state in trihalides. Due to the higher positive oxidation state of central atom in pentahalide state, these atoms will have larger polarizing power than the halogen atom attached to them.

Which nitrogen halide is more stable?

NF3
NF3 is the only halide of nitrogen that is stable.

Why are Pentahalides more reactive than trihalides?

Why does n not form Pentahalides?

The nitrogen valence shell is L –shell. L shell doesn’t hold d-orbitals, so Nitrogen doesn’t have vacant d-orbitals, so it cannot form expanded octet configuration. So, Nitrogen is unable to give pentahalides, Nitrogen only forms trihalides.

Why are Pentahalides more covalent than trihalides?

Due to the higher positive oxidation state of central atom in pentahalide state, these atoms will have larger polarizing power than the halogen atom attached to them. Hence due larger polarization of bond in pentahalide state as compared to trihalide state, the pentahalides are more covalent than trihalides.

Which acid of boron is more stable?

All three lighter boron trihalides (BF3, BCl3, and BBr3) form stable adducts with common Lewis bases. The sequence for the Lewis acidity is BF3 < BCl3 < BBr3,where BBr3 is the strongest Lewis acid.

Why are Pentahalides of phosphorus arsenic antimony and bismuth more covalent than their trihalides?

Pentahalides are more covalent than trihalides. This is due to the fact that in pentahalides +5 oxidation state exists while in the case of trihalides +3 oxidation state exists.

Why are pentahalides more stable down the group than trihalides?

In group 15 elements, the stability of pentahalides decreases down the group while the stability of trihalides increases. As we know that these elements exhibit +3 & +5 oxidation states and the stability of +5 oxidation state decreases down the group due to ‘inert pair effect’ .

Which of the following elements does not form pentahalide?

Elements react with halogens to form two series of halides : EX3 and EX5. Nitrogen does not form pentahalide due to non availability of the d orbitals in its valence shell. Pentahalides are more covalent than trihalides. All the trihalides of these elements except those of nitrogen are stable.

Why do group 15 pentahalides exhibit covalent behavior?

The reason for exhibiting covalent behavior could be multiple. But when pentahalides/trihalides of Group 15/ Group 5A are mentioned, we are specifically talking about Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), Bismuth (Bi). The group 15 elements have a general electronic configuration of ns2 np3 where n=2 to 6.