Abstract
Abstract In view of the current interest1–7 in one-dimensional magnetic materials, preliminary results of a EPR linewidth study on N,N′-bis(trifluoro-acetylacetone)ethylenediimine copper(II) [Cu(tfacac)2en] are reported in this note. Although a complete crystal structure of the copper chelate is not available, preliminary results8 indicate it is very closely related to the structure of the corresponding Nickel(II) chelate that has been completely determined. The space group for both crystals in P2 1/c. The unit cell dimensions for the copper chelate are a = 10.40 A, b = 16.23 A, c = 9.06 Å, β = 98.08° and there are four molecules per unit cell. The nearly planar [Ni(tfacac)2en] molecules crystallize in stacks forming a chain of Ni+2 ions along the c-axis with a Ni-Ni separation of about 4.0 Å. The bulky ligands separate the chains by about twice this distance. The similarity in the x-ray spot distributions indicates that the [Cu(tfacac)2en] has a similar structure. Studies of the copper chelate9 doped into the diamagnetic nickel chelate indicate that two of the principal g-values and the ion chain lie in the ac-plane.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call