Media type: E-Article Title: The σ- and π-bonding modes of a tetraanionic porphyrinogen ligand in zirconium(IV) complexes: a theoretical investigation Contributor: Rosa, Angela; Ricciardi, Giampaoio; Rosi, Marzio; Sgamellotti, Antonio; Floriani, Carlo Published: Royal Society of Chemistry (RSC), 1993 Published in: J. Chem. Soc., Dalton Trans. (1993) 24, Seite 3759-3766 Language: English DOI: 10.1039/dt9930003759 ISSN: 0300-9246; 1364-5447 Origination: Footnote: