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Self-assembled Transition Metal Coordination Frameworks of ...

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Chapter 4<br />

for both species considered, which points towards a dx3_ _, ground state [36].<br />

Generally, the variation in the g values indicate that the geometry around Cu(H)<br />

centers are affected by the nature <strong>of</strong> the coordinating anions.<br />

The geometric parameters G , empirical factor f and in-plane sigma bonding<br />

parameter 4, exchange<br />

interaction is negligible and if it is less than 4, considerable exchange interaction is<br />

indicated in the solid complex [1]. Though, the two Cu(H) centers are not coupled<br />

enough the possibility <strong>of</strong> presence <strong>of</strong> other Cu(H) centers <strong>of</strong> a second molecule may<br />

cause considerable exchange interactions, which is usually less possible in solution.<br />

Most <strong>of</strong> the G values calculated are greater than four and the exchange interaction <strong>of</strong><br />

that complexes are negligible. The value <strong>of</strong> in plane sigma bonding parameter

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