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Tuning Reactivity of Platinum(II) Complexes

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Table 4.4. Summary <strong>of</strong> Activation parameters for the substitution <strong>of</strong><br />

coordinated water ligands and the displacement <strong>of</strong> the linker by<br />

thiourea nucleophiles in [cis-{PtOH2(NH3)2-μ-pzn] +4 complexes<br />

……………………………………………………………………………………………..28<br />

Table 4.5. DFT calculated (NBO) charges for Pt atoms <strong>of</strong> optimised<br />

structures <strong>of</strong> monoaquaTU-substituted complexes ………………….32<br />

Table 5.1. A summary <strong>of</strong> DFT-calculated parameters for the aqua complexes<br />

pzn to pht. The table is ordered according to increasing values <strong>of</strong><br />

Natural Atomic charges (NBO) <strong>of</strong> Pt(<strong>II</strong>) centres ………………………10<br />

Table 5.2 Acid dissociation constants <strong>of</strong> platinum(<strong>II</strong>) complexes determined<br />

spectrophotometrically at 25 °C (Ionic strength, I = 0.1 M NaClO4/<br />

HClO4) …………………………………………………………………………………...14<br />

Table 5.3. A summary <strong>of</strong> DFT calculated Parameters for aqua/hydroxo<br />

complex systems <strong>of</strong> benzodiazines and their monocyclic<br />

analogues ………………………………………………………………………………16<br />

Table 5.4 Summary <strong>of</strong> second order rate constants <strong>of</strong> diazine-bridged<br />

dinuclear Pt(<strong>II</strong>) complexes; I = 0.1 M (NaClO4, adjusted with<br />

HClO4), T = 298.15 K ………………………………………………………………23<br />

Table 5.5 Summary <strong>of</strong> Activation parameters for the displacement <strong>of</strong><br />

coordinated water by a series <strong>of</strong> nucleophiles in complexes <strong>of</strong> the<br />

Type [cis-{PtOH2(NH3)2-μ-pzn] +4 , I = 0.1 M NaClO4 …….….…………27<br />

Table 6.1 Summary <strong>of</strong> the pKa values obtained for the deprotonation <strong>of</strong><br />

platinum-bound water <strong>of</strong> the different complexes …………………...11<br />

Table 6.2 DFT-calculated parameters for platinum(<strong>II</strong>)complexes ……………13<br />

Table 6.3 Summary <strong>of</strong> rate constants and activation parameters with the<br />

corresponding standard deviations for the substitution <strong>of</strong> aqua<br />

ligands by neutral (TU, DMTU, and TMTU) and ionic (I¯, Br¯ and<br />

SCN¯) nucleophiles, I = 0.10 M (NaClO4) …………………………………..21<br />

xviii

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