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    So my group project is based on the use of the CSD to identify trends within certain crystal structures. one of the questions posed to me was "How do bite anglesfor 2,2’-bipy and 1,10-phenanthroline vary for a 1st row transitionmetals?". I've collected and tabulated all the data, but I'm unsure as to how to explain the results. there doesn't seem to be a clear trend going along the first row. The average bite angles for 2,2’-bipy are as follows:
    Sc 72.653 Ti 72.867 V 73.946 Cr 78.59 Mn 73.451 Fe 79.844 Co 78.781 Ni 79.258 Cu 80.559 Zn 77.114 and the for 1,10-phenanthroline:
    Sc 69.535 Ti 74.462 V 74.111 Cr 79.876 Mn 73.272 Fe 80.695 Co 79.017 Ni 79.759 Cu 81.07 Zn 77.719 I have a feeling i may be looking at this the wrong way and should ignore any trends, instead looking at each metals electron arrangement. but i'm unsure.
    could anybody please help

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