The dinuclear [Zn(TTP-m-O-(CH 2 )-)] 2 (CH 2 ) complex 1 (where TTP-m-O = 5-(meta-hydroxyphenyl)-10,15,20-tritolylporphyrin dianion) coordinates axially nitrogen bases; pyrazine (Py) and pyrimidine. The solid 1 : 1 Py: 1 adduct has been isolated and identified as dinuclear complex (μ-Py) [Zn(TTP-m-O-(CH 2 )-] 2 (CH 2 ) 2 with pyrazine base bridging intramolecularly two zinc(II) metal ions based upon variable temperature 1-D and 2-D 1 H NMR spectral measurements.