Theoretical aspects of the heterobimetallic dimers with the T over square structural motif: synthesis and structure of a heteronuclear platinum and palladium complex with 1-methylcytasinato bridging ligands

X-ray crystallographic determination of the molecular structure of trans-(NH3)2Pt(mu-1-MeC-)2Pd(NH3)Pd(NH3)4 0.5(NO3)3*3H2O shows that this compound crystallizes in the triclinic space group and has a square planar coordination of Pd and a square pyramidal coordination of Pt with Pd in the apical position. Extended studies have led to the formation of d8-d10 Pt(II)-Hg(II)13. The effect and correlation of the M-M' bond in d8-d8 dimers are discussed.