Journal
CHEMICAL PHYSICS LETTERS
Volume 344, Issue 5-6, Pages 573-577Publisher
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DOI: 10.1016/S0009-2614(01)00827-2
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The interaction between two platinum complexes and water was investigated using the DFT functionals PW91 and BLYP. Previous MP2 and HF calculations have shown that when a H2O molecule approaches Pt with its O atom, the interaction is governed by electrostatics and the MP2 and HF interaction energy curves nearly coincide, whereas for the approach with H pointing towards Pt, there is a significant dispersion component portrayed only by MP2 calculations. Here we show that both PW91 and BLYP satisfactorily reproduce the MP2 curves, PW91 slightly exaggerating and BLYP slightly underestimating the dispersion-induced energy minima. This result is discussed in view of the different behavior of the two exchange functionals at large density gradients. (C) 2001 Elsevier Science B.V. All rights reserved.
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