Cobalt(II) and nickel(II) coordination compounds derived from 3,3′, 5,5′-tetramethyl-4,4′-bi-1H-pyrazole, 3,3′, 5,5′-tetramethyl-4,4′ methylene-bis-1H-pyrazole and 4,4′-methylene-bis-1 H-pyrazole

1. Cuadro, A.
2. Elguero, J.
3. Navarro, P.
4. Royer, E.
5. Santos, A.