Application of the NOE experiment to the analysis of boron hydride derivatives: confirming the assignments of the pseudocloso-complex [1,2-Ph 2 -3-{Cp*}-3,1,2-IrC 2 B 9 H 9 ] (Cp*=η 5 -C 5 Me 5 ) and the closo-compounds 1-Ph-1,2-C 2 B 1 0 H 1 1 and 1-Ph-2-Me-1,2-C 2 B 1 0 H 1 0