Self-assembled Transition Metal Coordination Frameworks of ...

Chapter 3
N(l3)—C(35), N(2l)-C(58), N(29)-C(81) bond distances are smaller compared to
their counterparts {by 0.030(23), 0.030(2l) and 0.060(23) A respectively}, confirming
the deprotonation of the thiol tautomeric form to form the square grid by four
monoanionic ligands. The molecules are connected by various intermolecular
interactions involving water and PF6' anions. Two of the water molecules are trapped
inside the four uncoordinated pyridyl groups (Fig. 3.23). This kind of water of
crystallization as a receptee and associated hydrogen bonds are supramolecularly very
potent. Some C—H---1: and very weak rt---1: interactions are involved in the packing of
molecules in the lattice (Fig. 3.24). Relevant hydrogen bonding and other interactions
are summarized in Table 3.8. The terms for 1:---1: interactions in the Table describe: Cg
=Centroid, (1 =dihedral angles between planes I and J, B =angle Cg(I)---Cg(J). Only
hydrogen bonding of angles