Does it change the compound if the element letters in its molecular formula are switched?
Apart from affecting organic compounds, it also affects coordination compounds.


$\ce{Hg[Co(SCN)4]}$ is a significantly different compound from $\ce{Co[Hg(SCN)4]}$. The central metal atom and the counter-ions in both cases differ, as does the complex anion.
In fact, in the above compound itself, $\ce{Hg[Co(SCN)4]}$ differs from $\ce{Hg[Co(CNS)4]}$ or $\ce{Hg[Co(NCS)4]}$: this is called linkage isomerism. The order in which ligand atoms are written denotes the atom of attachment to the central metal atom, which happens to differ in this case.
The complex salts $\ce{[Co(NH4)6]^3+[Cr(CN)6]^3-}$ and $\ce{[Co(CN)6]^3+[Cr(NH4)6]^3-}$ - formed by swapping the two radicals - are coordination isomers, and not identical.