N-(Chalcogen)phosphorylated (chalcogen)ureas of zinc and cadmium(ii): SSPs for group 12-16 thin filmsElectronic supplementary information (ESI) available: TGA/DSC analyses of all complexes (Fig. S6). CCDC 986590-986594 for 1, 7, 8, 11 and 15. Details of the X-ray structure analyses (Table S1). XRPD patterns of ZnO obtained from pyrolysis of 8 (Fig. S2) and of the CdO and CdS mixture obtained from pyrolysis of 13 (Fig. S3). GAXRD pattern of CdS film obtained from 13 (Fig. S4). SEM images of CdS t

The bis-chelates of zinc ( 7-11 ) and cadmium ( 12-17 ) with general formula [M{R 2 P(X)NC(Y)NR′-η 2 -X,Y} 2 ] were obtained from ligands 1-6 ( i Pr 2 P(X)NHC(Y)NC 4 H 8 : 1 : X = S, Y = S; 2 : X = S, Y = O; 3 : X = O, Y = S; 4 : X = S, Y = Se, 5 : X = Se, Y = S; Ph 2 P(X)NC(Y)NC 5 H 10 : 6 : X = S, Y = S). 4 and cadmium complex 15 are the first examples of this ligand system with carbon-bonded selenium as a donor atom. All the compounds were characterized by FTIR and multi-nuclear NMR spectroscopies, and microanalysis. The molecular structures of complexes 1 , 7 , 8 , 11 , and 15 were elucidated by single crystal X-ray diffraction. Thermal gravimetric analysis (TGA) and thermolysis experiments were carried out for the metal complexes. Selected pyrolysis residues were analyzed by scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and X-ray powder diffraction (XRPD). Remarkably, cadmium complex 13 gave a few crystals of CdS encrusted on the surface of CdO. Preliminary studies using the O,S-mixed cadmium complexes ( 13 and 14 ) as single source precursors (SSPs) were carried out for the deposition of thin films via AA-CVD. The results show that CdS films are obtained from both complexes, and in the case of 14 (the complex containing a P&z.dbd;O fragment), persistent high carbon content was detected. The bis-chelates [M{R 2 P(X)NC(Y)NR′-η 2 -X,Y} 2 ] were evaluated as suitable SSPs for the synthesis of metal chalcogenide thin films by AA-CVD.