Mass Spectrometry of the Zn II Complexes

Only labile coordination of the phenyl ether arms of the CH3HL3 ligand to the Zn(II) ions is proposed (due to steric demand of the phenyl groups). Therefore, 

Under conditions similar to the kinetic studies (water/acetonitrile 1 1) the complex [Zn2(CH3L2)(CH3COO)2]PFg was mixed with 25 equivalents BPNPP (a slow substrate employed for enzyme kinetic studies). The mass spectrum (Fig. 4.12) measured one hour after mixing showed the presence of [Zn2(CH3L2)-(BPNPP)- 

---