η4-Phosphacycle complexes were obtained from PPh2Ar (Ar = Ph, 1-Naph) via cyclometallation, alkyne insertion and P–C reductive elimination at a Ru centre.
The photochemical generation of isolable bis-cyclometalated Pt(iv) hydrides via photooxidative C–H addition reactions is demonstrated from easily accessible Pt(ii) precursors using visible light.