If you are saying you have a U shaped piece of kitchen with worktop planned to go around all sides of the the U with a hob in the centre and corner units either side it won't fit.
The installer (or you if you're having a go) won't be able to fit the worktop jointing bolts properly as the hob (well more specifically the hole in which it sits) will be in the way and your joints will not only look pants but they'll come apart in due course.
Of coures, it's just my assumption that this is what you are trying to achieve as you haven't given more information. A better clue would be gratefully receied - then perhaps a more definitive answer will ensue.
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