( ( ( Electronic ( energy levels ) ) ( in ( metal ( complexes ( bonding ( , ( spectra ( and ( magnetic properties ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (JJ Electronic) (NN energy) (NNS levels)) (PP (IN in) (NP (JJ metal) (NNS complexes) (NN bonding) (, ,) (NN spectra) (CC and) (JJ magnetic) (NNS properties))) (. .)))
Electronic energy levels in metal complexes bonding, spectra and magnetic properties.
(ROOT (S (NP (DT The) (JJ metallic) (NN bond)) (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (NP (NP (DT the) (NNS properties)) (PP (IN of) (NP (NNS metals))))))) (. .)))