in deuterated toluene heated at 150°C in a sealed NMR tube for 5-10 h; not isolated ((1)H NMR data); yield of the cyclometallated complex increases when thermolysis is carried out in the presence of 2 or more equiv of 2,6-t-Bu2C6H3OH;

in deuterated toluene heated at 150°C in a sealed NMR tube for 5-10 h; not isolated ((1)H NMR data); yield of the cyclometallated complex increases when thermolysis is carried out in the presence of 2 or more equiv of 2,6-t-Bu2C6H3OH;