Synthesis and Structural Characterisation of Hafnium(IV) Mono- and Diphthalocyanines Obtained under Oxidation Conditions with Halogens

Structural Diversity of F-Element Monophthalocyanine Complexes

The preparation and structural characterization of a series of lanthanide and uranium(IV) phthalocyanine halide complexes were achieved by reaction of the corresponding metal halide with Li₂ Pc. A preliminary survey of their reactivity includes ring reduction of Li(THF)₄ [PcUCl₃ ] with KC₈ leading to the first structurally characterized Pc^4- actinide complex, hydrolysis of PcDyCl(DMSO) to PcDyOH(H₂ O)₃ and preparation of a unique trimeric triangular Li(PcDy)₃ (OH)₄ (H₂ O) cluster.

Bis(hafnium(IV) stapled phthalocyanine) derivative complex. Synthesis and structure

Thermal reaction of phthalonitrile with hafnium powder under iodine monobromide (IBr) yields a new type molecule: bis(hafnium(IV) stapled phthalocyanine) derivative complex. X-ray single crystal analysis shows that the complex molecule consists of two hafnium phthalocyanine units bridged by the unique internal ligand that stapled by two carbon–carbon [Formula: see text] bonds to both HfPc-units. The internal dianionic ligand consists of two fragments, each of them present the three fourth part of phthalocyaninate ring. Both fragments are linked together through the bridging 1,2-di[amine(imine)methyl]benzene. The X-ray conformation of the bis(hafnium(IV) stapled phthalocyanine) derivative complex cation is confirmed by DFT calculations. An absence of the Q-band in the UV-vis spectrum, the typical band for the fully delocalized [Formula: see text]-electron aromatic phthalocyaninato(2-) ring system, indicates on drastic modification of the chromophore in this Hf-phthalocyanine complex that was confirmed by TD DFT calculations.

Reducing zirconium(iv) phthalocyanines and the structure of a Pc4−Zr complex

Reduced Zirconium(iv) phthalocyanines were prepared from a variety of reducing agents (KC₈, KEt₃BH or LiCp*) and a reduced Pc⁴⁻Zr(iv) species was isolated and structurally characterized; it shows partial bond localization consistent with a reduction of the Pc ring.