Abstract
The partially [d6, 2] and fully [d20, 3] deuterated analogues of (QuinH)2CuBr4·2H2O (d0, 1) were prepared and their crystal structures were determined [Quin = quinoline]. In both compounds, there is a clear disorder in the positions of the bromide ions which was resolved. This led to a reexamination of the structure of the parent, fully protonated compound (1) where a small percentage of previously unrecognized disorder was also observed and the structure rerefined. Variable temperature magnetization measurements over the range 1.8–310 K indicate that all three materials behave as magnetically well-isolated layers that can be evaluated using the 2D-quantum Heisenberg antiferromagnetic model. Final fitting results for the partially (J = −5.96(5) K) and fully (J = −5.77(2) K) deuterated compounds indicate slightly weaker exchange compared to the protonated compound (J = −6.17(3) K), likely as a result of the increased disorder in the deuterated phases.
Graphical Abstract
![](/cms/asset/398ae0d2-2940-40e4-a0ff-a14f01732454/gcoo_a_1706172_uf0001_c.jpg)
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Acknowledgements
We are grateful to Dr. Matt Polson for helpful discussions.
Disclosure statement
No potential conflict of interest was reported by the authors.