Friday, 6 October 2006 - 2:20 PM
Endicott Ballroom (Holiday Inn Binghamton - Arena)
292

Magnetic Ladder: Design, Synthesis, and Theoretical Calculations

Alex Shapiro, Christopher P. Landee, Grant Tremelling, and Mark M. Turnbull. Clark University, Worcester, MA

We have been involved in a program to design and synthesize a family of magnetic ladders. Here, an overview of previous work will be presented along with our most recent results. The reaction of 2,3-dimethylpyridine with HBr and CuBr2 produces the complex (2,3-dmpyH)2 CuBr4 [2,3-dmpyH = 2,3-dimethylpyridinium]. The CuBr42- anions pack in the lattice in the form of a magnetic ladder with the rails formed by short Br…Br contacts parallel to the a-axis and the rungs formed by short Br…Br contacts via an inversion center. Magnetic susceptibility, magnetization, and neutron scattering data confirm the magnetic structure as that of a two-leg, S = ½ ladder. Ab initio calculations are also presented which support the magnetic structure as one in the weak exchange regime (Jrail > Jrung).

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