Octahedral complexes are generally low-spin. Octahedral complexes of only the first series of transition metals adopt high-spin states. This is because of lesser ligand field splitting due to smaller size of the cation in the first row of transition elements. Tetrahedral complexes mainly exist in high spin states due to lesser ligand field splitting resulting from four ligands as compared to 6 in octahedral geometry. However, there are other factors that influence the spin configuration. These include the nature of ligands and oxidation state of the metal cation. Strong field ligands in the spectrochemical series will cause more field splitting resulting in low spin complexes and vice versa. Also, the higher the oxidation state of the metal, closer the ligands will be drawn, and more will be the field splitting. This results in low spin complexes yet again.