Abstract
By using broken lines to represent coordination interactions in organometallic and other coordinated compounds, we can draw structures satisfying the valencies of the atoms present. These broken lines should be used to replace many false single covalent bonds now used to depict organometallic and coordinated compounds. Chemical drawing software should not recognize such broken lines as single covalent bonds and they should be ignored. An example of confusing and erroneous structural representation of organometallics and coordination compounds is discussed.
Highlights
In recent papers [1], the original drawing of structure I depicts extended valencies at 6 atoms, as identified by most chemical drawing software packages (Figure 1)
In structural drawings of organometallics and complexes, one can often find even more frequent, confusing or erroneous cases. In this short paper I would like to recommend the proper use of dashed lines in drawing molecular structures to avoid confusion and errors
In a recent paper [3], we have proposed that various bonds commonly used for specification of absolute configuration, e.g. the two types of solid wedge and broken wedge representations most frequently seen in literature, can be replaced by only one kind of wedge, namely the solid wedge (c and d)
Summary
In recent papers [1], the original drawing of structure I depicts extended valencies at 6 atoms (four Sn and two O), as identified by most chemical drawing software packages (Figure 1). According to this structural diagram the unit formula would be 2 C30H49F2N4O9Sn2 (or 2× C30H49F2N4O9Sn2). According to the reaction scheme (see Scheme 1) given in the original papers [1], the Molecules 2002, 7 formula of the starting material is C15H25FN2O5Sn, the correct molecular formula for product I should be 2 C30H48F2N4O9Sn2 (or 2 × C30H48F2N4O9Sn2) [2].
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