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Self-assembled Transition Metal Coordination Frameworks of ...

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Chapter 2<br />

Table 2.5. Hydrogen bonding geometry and C—H---1: interactions <strong>of</strong> H2L3.<br />

D—H---A D—H (A) H---A (A) D---A (A) D_H...A()<br />

1 A)<br />

N(3A)—H(3AN)<br />

N(4A)—H(4AN)-­ -N(6A)<br />

N(4A)—H(4AN)-­ -N(2A)<br />

N(3B)—H(3BN)-­ -N(lB)<br />

N(4B)—H(4BN)--­N(6B)<br />

N(4B)—H(4BN)--­N(2B)<br />

0.79(4)<br />

0.85(3)<br />

0.85(3)<br />

0.86<br />

0.85(4)<br />

0.85(4)<br />

2.15(4)<br />

2.01(3)<br />

2.21(3)<br />

2.02<br />

1.96(4)<br />

2.20(4)<br />

2.700(5)<br />

2.688(5)<br />

2.558(5)<br />

2.692(5)<br />

2.646(4)<br />

2.572(5)<br />

128(4)<br />

137(3)<br />

105(3)<br />

134<br />

136(3)<br />

107(3)<br />

C(8A)—H(8A)---Cg(8)’ 0.93 2.59 3.3821(44) 143<br />

C(18A)—H(18A)---Cg(7)” 0.93 2.96 3.8008(46) 151<br />

C(19A)—H(19A)---Cg(9)” 0.93 2.92 3.6909(45) 141<br />

D= donor, A=acceptor; Symmetry codes: (a) -x, -y, 1 - z; (b) 1-x, l-y, 1-z.<br />

Each molecule contains two ten membered quinoline rings comprising atoms<br />

N(l), C(l)-C(9) and N(6), C(13)-C(21). There are eight centroids viz. Cg(1) and<br />

Cg(7) [comprising atoms N(1), C(l), C(6), C(7), C(8), C(9) with maximum deviations<br />

<strong>of</strong> 0.025(3) A for C(9A) and 0.011(4) A for C(9B)], Cg(2) and Cg(8) [comprising<br />

atoms N(6), C(13), C(14), C(15), C(16), C(21) with maximum deviations <strong>of</strong> 0.018(4)<br />

A for C(2lA) and -0.008(4) A for C(15B)], Cg(3) and Cg(9) [comprising atoms C(l),<br />

C(2), C(3), C(4), C(5), C(6) with maximum deviations <strong>of</strong> 0.020(4) A for C(1A) and ­<br />

0.006(4) A for C(2B)], and Cg(4) and Cg(l0) [comprising atoms C(16), C(17), C(18),<br />

C(19), C(20), C(21) with maximum deviations <strong>of</strong> 0.019(5) A for C(19A) and 0.014(4)<br />

A for C(16B)], which are parts <strong>of</strong> four quinoline rings <strong>of</strong> the two forms A and B <strong>of</strong><br />

compound HZL3. In molecule B each <strong>of</strong> the two quinoline rings are in separate planes,<br />

with maximum deviations <strong>of</strong> -0.018(4) A for C8B and 0.034(4) A for C(19B), and<br />

makes an angle <strong>of</strong> 5.19(11)° each other; while in molecule A both quinoline rings<br />

show slight deviation in planarity compared to that in molecule B. Here the quinoline<br />

rings, Cg(5) involving N(1A) and Cg(6) involving N(6A), show maximum mean<br />

plane deviations <strong>of</strong> 0.057(5) A for C(4A) and 0.050(5) A for C(19A) respectively. The<br />

dihedral angles 3.3(2)° between the mean planes <strong>of</strong> Cg(1) and Cg(3) and 2.7(2)°<br />

62

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