Focus 6.13 Textbook

[Nicole Attiq 3D]

I'm confused about the explanation in the solutions manual for 6.13a), which says that B(OH)3 has no resonance. This I understood, but then it said the reason for this was that, "B(OH)3 is a very weak acid because it does not have a conjugate system to delocalize the electrons on the oxygen to weaken the O-H bond". Maybe I'm just very tired but I am super confused by that haha. Thank you in advance!

[Hazelle Gunawan 3G]

I'm not exactly sure what it means by conjugate system, but B isn't electronegative enough to pull electrons towards itself to cause that delocalization, so it would be more difficult to remove the H+ ion as opposed to HClO, for example. Hope that helps!