Valence problem

Hi. I have a problem drawing a molecule trifluorotris(1,1,2,2,2-pentafluoroethyl)-λ⁵-phosphanuide or tris(pentafluoroethyl)trifluorophosphate the structure is in lots of places but i can't have it in marvin 17.2.6, it says valence problem in the phosphorus, but i'm sure is the way i draw it. it doesn't work in chemicalize either.

I hope you can help me.

Thanks

Dear Edgar,

you have more than one way to solve this problem.

The structure drawn has valence error indicated, because Marvin has a separate coordinate bond, so P atoms with 6 covalent bonds are found by the valence checker.

What we can do:

1. Turn off the valence checker. ->Tick off the Highlight valence option in Edit>Preferences>Structure.

2. Set the valence of P to 6. ->Select the P atom then navigate to Atom>Valence submenu and set the number. The visibility of the valence can be disabled in View>Advanced>Valence.

3. Use coordinate bond. You can select the display of coordinate bonds in in Edit>Preferences>Bonds menu item.

Please find attached the second and third solutions.

Best regards,

Nikolett Mihala