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Coordination abilities of polycyano anions in the solid state: coordination geometries and dd transition energies of mixed-ligand solvatochromic copper( ii ) complexes with B(CN) 4 , C(CN) 3 , and N(CN) 2 anions

Lan, Xue ; Tominaga, Takumi ; Mochida, Tomoyuki

Dalton Transactions, Dalton Transactions, 2017, Vol.46(15), pp.5041-5047 [Periódico revisado por pares]

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  • Título:
    Coordination abilities of polycyano anions in the solid state: coordination geometries and dd transition energies of mixed-ligand solvatochromic copper( ii ) complexes with B(CN) 4 , C(CN) 3 , and N(CN) 2 anions
  • Autor: Lan, Xue ; Tominaga, Takumi ; Mochida, Tomoyuki
  • Assuntos: Chemistry
  • É parte de: Dalton Transactions, Dalton Transactions, 2017, Vol.46(15), pp.5041-5047
  • Descrição: B(CN) 4 , C(CN) 3 , and N(CN) 2 are highly versatile polycyano anions that produce various functional compounds. To investigate the coordination abilities of these anions in the solid state quantitatively, we synthesized mixed-ligand Cu( ii ) complexes: [Cu(R-acac)(tmen)X] (X = polycyano anion, R-acac = acetylacetonate or butyl-acetylacetonate, tmen = tetramethylethylenediamine). The coordination abilities of the anions, increasing in the order B(CN) 4 < C(CN) 3 < N(CN) 2 , result in a decrease in the dd transition energies of the complexes and the shortening of the axial coordination distance. The influence of crystal packing on the coordination geometries and dd transition energies of the complexes was also demonstrated. The donor numbers of the anions were determined from the dd transition energies in solution.

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