Syntheses and structural characterizations ofcloso and nido 10-vertex metallatricarbanonaboranes
Deboronation of the 11-vertex metallatricarbadecaboranes 1-(η 5 -C5H 5 )-2-Ph- closo -1,2,3,4-M-C 3 B 7 H 9 [M = Ru, Fe] and 1,1,1-(CO) 3 -2-Ph- closo -1,2,3,4-M-C 3 B 7 H 9 [M = Re] with tetrabutylammonium fluoride (TBAF) produced the first examples of the 10-vertex families of closo and nido metallatricarbanonaborane complexes, 2-(η 5 -C5H 5 )-10-Ph- closo -2,1,6,10-M-C 3 B 6 H 8 [M = Ru ( 1 ), Fe ( 2 )] and 5,5,5-(CO) 3 -10-Ph- nido -5,6,9,10-Re-C 3 B 6 H 9 – ( 3 ). Crystallographic characterizations of 1 and 3 confirmed geometries, based on a bicapped square antiprism for 1 and a bicapped square antiprism with one missing vertex for 3 , that are consistent with their respective 22 ( closo ) and 24 ( nido ) skeletal-electron counts.