Tetrakis(1‐adamantylcarboxylato)dikupfer(II) Cu 2 (1‐Ad) 4 – Synthese, Struktur und X‐/Q‐Band‐EPR‐Untersuchungen

Tetrakis(1‐adamantylcarboxylato)dicopper(II) Cu 2 (1‐Ad) 4 – Synthesis, Structure and X‐/Q‐band EPR Investigations The synthesis and the crystal structure of tetrakis(1‐adamantylcarboxylato)dicopper(II) are reported. [Cu 2 (1‐Ad) 4 ·2DMF] ( 1 , 1‐Ad = adamantylcarboxylate) crystallizes in the space group $P{\bar 1}$ (Z = 2) with two crystallographically distinguishable complexes in the unit cell. The averaged Cu‐Cu distance of 260.5 pm is smaller than that found for Cu 2 (ac) 4 ·2H 2 O. The combination of temperature‐dependent X‐ and Q‐band powder EPR investigations in the temperature range 6 ≤ T ≤ 295 K show the presence of an antiferromagnetically coupled Cu‐Cu dimer and allow a precise determination of the spin‐Hamiltonian parameter. A comparison of those with that derived for Cu 2 (ac) 4 ·2H 2 O indicate a higher symmetry within the Cu 2 O 8 central unit of [Cu 2 (1‐Ad) 4 ·2DMF].