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1 Supporting Information Page 2-4. The B3LYP optimized gas phase structures of [Bmim + Cl - ] Pd complex. Page The B3LYP optimized gas phase structures of [Bmim + Cl - ] Pd 2 complex. Page The B3LYP optimized gas phase structures of [Bmim + BF 4 - ] Pd complex. Page The B3LYP optimized gas phase structures of [Bmim + BF 4 - ] Pd 2 complex. Page The B3LYP optimized gas phase structures of [Bmim + PF 6 - ] Pd complex. Page The B3LYP optimized gas phase structures of [Bmim + PF 6 - ] Pd 2 complex. Page 30. The B3LYP optimized structures of [Bmim + BF 4 - ] and [Bmim + PF 6 - ] ion pair in the corresponding simulated solvents. Page The B3LYP optimized structures of [Bmim + BF 4 - ] Pd and [Bmim + BF 4 - ] Pd 2 complex in simulated [Bmim + BF 4 - ] solvent. Page The B3LYP optimized structures of [Bmim + PF 6 - ] Pd and [Bmim + PF 6 - ] Pd 2 complex in simulated [Bmim + PF 6 - ] solvent. Page Information of solvent effect calculation in Gaussian 03. 1

2 a1 HF= Zero-point correction= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd a2 HF= Zero-point correction= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd

3 HF= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd a3 a4 HF= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd

4 a5 HF= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd a6 HF= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd

5 b1 b2 HF= Zero-point correction= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd Pd HF= Zero-point correction= C C N C N H H C H H H H C H C H C H H C H H H H H Pd Pd Cl

6 b3 HF= Zero-point correction= C C N C N H H C H H H H C H C H C H H C H H H H H Pd Pd Cl b4 HF= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd Pd

7 HF= C C N C N H H C H H H H C H C H C H H C H H H H H Pd Pd Cl b5 HF= S=3 C C N C N H H C H H H H C H C H C H H C H H H H H Pd Pd Cl b6 7

8 HF= b7 HF= S=3 b8 C C C N N C C C N N H C H C C C H C H C H Cl H H C H H H C H H H C H H H H H C H H H H H H H H H H H Pd H Pd Pd Cl Pd

9 b9 HF= S=3 C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd Pd b10 HF= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd Pd

10 b11 HF= S=3 C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd Pd b12 HF= C N C C N C C C C C Cl H H H H H H H H H H H H H H H Pd Pd

11 c1 HF= Zero-point correction= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd c2 HF= Zero-point correction= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd

12 c3 HF= C C N C N H H C H H H H C H C H C H H C H H H H H Pd B F F F F c4 HF= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd

13 c5 HF= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd c6 HF= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd

14 HF= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd c7 14

15 d1 HF= Zero-point correction= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd d2 HF= Zero-point correction= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd

16 HF= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd d3 d4 HF= S=3 C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd

17 HF= S=3 C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd d5 d6 HF= S=3 C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd

18 d7 HF= S=3 C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd d8 HF= S=3 C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd

19 HF= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd d9 d10 HF= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd

20 e1 HF= Zero-point correction= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd e2 HF= Zero-point correction= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd

21 e3 HF= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd e4 HF= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd

22 e5 HF= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd

23 f1 HF= Zero-point correction= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd f2 HF= Zero-point correction= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd

24 f3 HF= Zero-point correction= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd f4 HF= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd

25 f5 HF= N C C N C C C C C C H H H H H H H H H H H H H H H Pd Pd P F F F F F F f6 HF= N C C N C C C C C C H H H H H H H H H H H H H H H Pd Pd P F F F F F F

26 f7 HF= N C C N C C C C C C H H H H H H H H H H H H H H H Pd Pd P F F F F F F f8 HF= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd

27 f9 HF= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd f10 HF= S=3 N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd

28 f11 HF= N C C N C C C C C C H H H H H H H H H H H H H H H Pd Pd P F F F F F F f12 HF= S=3 N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd

29 f13 HF= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd

30 Sum of electronic and zero-point Energies= N C C N C C C C C C H H H H H H H H H H H H H H H B F F F F Sum of electronic and zero-point Energies= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F

31 c1 in solution Sum of electronic and zero-point Energies= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd c2 in solution Sum of electronic and zero-point Energies= C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd

32 d1 in solution Sum of electronic and zero-point Energies= Total free energy in solution: with all non electrostatic terms (a.u.) = C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd d2 in solution Sum of electronic and zero-point Energies= Total free energy in solution: with all non electrostatic terms (a.u.) = C N C C N C C C C C F B F F F H H H H H H H H H H H H H H H Pd Pd

33 e1 in solution Sum of electronic and zero-point Energies= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd e2 in solution Sum of electronic and zero-point Energies= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd

34 f1 in solution Sum of electronic and zero-point Energies= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd f2 in solution Sum of electronic and zero-point Energies= N C C N C C C C C C H H H H H H H H H H H H H H H P F F F F F F Pd Pd

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