With what neutral molecules is ${{ClO}^{-}}$ isoelectronic? Is that molecule a Lewis base?

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#1

${{ClO}^{-}}$ has 26 electrons. It is isoelectronic with two neutral molecules. These are oxygen difluoride ($OF _{ 3 }$) and chlorine fluoride (CIF).
Out of these, CIF is a Lewis base as it can further donate electrons to two more atoms of fluorine to
form $CIF _{ 3 }$.