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Copper‐Assisted Hemiacetal Synthesis: A Cu II Chain Obtained by a One‐Step in situ Reaction of Picolinaldehyde
Author(s) -
Dhal Piu,
Sasmal Ashok,
GómezGarcía Carlos J.,
Bauzá Antonio,
Frontera Antonio,
Pilet Guillaume,
Mitra Samiran
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402176
Subject(s) - chemistry , copper , thiocyanate , electron paramagnetic resonance , dimer , crystallography , antiferromagnetism , potassium thiocyanate , spectrophotometry , inorganic chemistry , organic chemistry , nuclear magnetic resonance , physics , chromatography , condensed matter physics
The 1D polymer complex [Cu 2 (L) 2 (SCN) 2 ] n ( 1 ) has been synthesised in a one‐step in situ reaction of picolinaldehyde with sodium thiocyanate. The complex 1 was characterised by FTIR spectroscopy, UV/Vis spectrophotometry and elemental analysis. The crystal structure of complex 1 shows that chains of dimer complexes are formed with tetra‐ and pentacoordinate copper centres alternately linked by one thiocyanato and two alkoxido bridges. Variable‐temperature magnetic measurements showed a strong antiferromagnetic interaction between the copper centres within the dimer mediated by the two alkoxido bridges with a J value of –374 cm –1 , which is in agreement with the DFT‐calculated value of –284 cm –1 . EPR and cyclic voltammetric analyses were also carried out, as well as DFT calculations to evaluate the packing forces and their energies.