MH2O6n
MH2O6n is a shorthand notation used in coordination chemistry to describe a metal aquo complex in which six water molecules are coordinated to a central metal ion. In formal notation this is written as [M(H2O)6]^n+, with 'M' representing a metal cation and 'n' the overall charge of the complex. The six aquo ligands create an octahedral coordination geometry around M and often define the complex's basic properties in solution.
In aqueous solution, many metal salts dissociate and rapidly form [M(H2O)6]^n+ species. The identity of M and
Spectroscopic and kinetic properties of these aquo complexes vary widely. Transition-metal ions typically show characteristic d–d
Although MH2O6n serves as a useful schematic for discussing hydration shells, it is not a formal name.