Three-dimensional triazenido layers attained through classical and non-classical hydrogen interactions and its coordination to palladium under prolific occurrence of bifurcated hydrogen bonding

The new ligand 1,3-bis(3-methoxy-4-methylbenzoate) triazene (1, bmmbt), and the already known ligand 1,3-bis(4-acetylphenyl)triazene (bapht), yield the two new palladium(II) complexes [(bmmbt)Pd(PPh3)2Cl]·DMSO (2) and [(bapht)Pd(PPh3)2Cl] (3) (Ph = phenyl; DMSO = dimethylsulfoxide). Compound 1 shows the existence of more than one interaction promoting the coupling between the triazene chains. Other remarkable types of interactions in 1 are bifurcated hydrogen contacts and non-classical CH···π bonding. Complexes 2 and 3 present a planar geometry, supported also through bifurcated intramolecular Cl···H–C interactions, as well as the occurrence of trifurcated Cl···H–C intermolecular interactions.

The new ligand 1,3-bis(3-methoxy-4-methylbenzoate) triazene shows the existence of bifurcated hydrogen interactions and non-classical CH···π bonding. The triazene complexes [(bmmbt)Pd(PPh3)2Cl]·DMSO and [(bapht)Pd(PPh3)2Cl] are planar, geometry supported through bifurcated (intramolecular) and trifurcated (intermolecular) Cl···H–C interactions.Figure optionsDownload as PowerPoint slideHighlights
► In 1,3-bis(3-methoxy-4-methylbenzoate) triazene occurs pairing between the layers.
► Non-classical CH···π bonding are also present in the triazene ligand.
► The structures of [(bmmbt)Pd(PPh3)2Cl]·DMSO and [(bapht)Pd(PPh3)2Cl] are discussed.
► Presence of bifurcated Cl···H–C and trifurcated Cl···H–C bonding in both Pd complexes.