The pentachlorides of the elements above and below arsenic in group 15, phosphorus pentachloride and antimony pentachloride are much more stable and the instability of AsCl5 appears anomalous.
Pentahloridi elemenata iznad i ispod arsena u grupi 15, fosfor pentahlorid i antimon pentahlorid su znatno stabilniji i nestabilnost AsCl5 izgleda anomalo.