The structure of [Zn(NH3)4]2+ is a tetrahedral complex.
In the complex, zinc (Zn2+) is at the center, surrounded by four ammonia (NH3) ligands. Each ammonia molecule acts as a ligand and donates a lone pair of electrons to form a coordinate bond with the zinc ion.
The resulting structure is a tetrahedron, with the zinc ion at the center and the four ammonia ligands arranged symmetrically around it. The ammonia ligands are positioned at the four vertices of the tetrahedron.
Overall, the complex has a net positive charge of 2+, indicating that it has lost two electrons. The coordination number of the zinc ion is four, corresponding to the four ammonia ligands.