Inorganic Chemistry, Vol.44, No.23, 8194-8196, 2005
A tetranuclear (CrNi3II)-Ni-III cyano-bridged complex based on M(tacn) derivative building blocks
The reaction of Cr(Bztacn)(CN)(3) (Bztacn is 1,4,7-trisbenzyl-1,4,7-triazacyclononane) with Ni(Prtacn)Cl-2 (iPrtacn is 1,4,7-trisisopropyl-1,4,7-triazacyclononane) affords a CrNi3 tetranuclear complex. Variable temperature and magnetization versus field measurements show a S = (9)/(2) ground state and an appreciable magnetic anisotropy with a negative D-9/2 value equal to -0.54 cm(-1). Magnetization studies on one single crystal using a micro-SQUID show a fast tunneling process at zero field at very low temperature.