Complex sentence: The nitrosyl cation is isoelectronic with carbon monoxide and cyanide, thus the bonding between a nitrosyl ligand and a metal follows the same principles as the bonding in carbonyl complexes.
Split into simpler sentences: The nitrosyl cation is isoelectronic with carbon monoxide and cyanide. The bonding between a nitrosyl ligand and a metal follows the same principles as the bonding in carbonyl complexes.