Formation of closo-rhodacarboranes containing η2,η3-(CH2=CHC5H6) ligand in the reaction of μ-dichloro-bis[(η4-norbornadiene)rhodium] with nido-dicarbaundecaborates [K][nido-7-R1-8-R2-7,8-C2B9H10]

Abstract

Formation of closo rhodacarboranes containing η η η η η 2 ,η η η η η 3 (СН 2 =СНС 5 Н 6 ) ligand in the reaction of µ µ µ µ µ dichloro bis[(η η η η η 4 norbornadiene)rhodium] with nido dicarbaundecaborates [K][nido 7 R 1 8 R 2 7,8 C 2 B 9 H 10 ]The reactions of a complex [(η 4 C 7 H 8 )RhCl] 2 (C 7 H 8 is norbornadiene) with salts of substituted nido dicarbaundecaborates, [K][nido 7 R 1 8 R 2 7,8 C 2 B 9 H 10 ] (R 1 = R 2 = H (a); R 1 = R 2 = Me (b); R 1 , R 2 = 1´,2´ (CH 2 ) 2 C 6 H 4 (c); R 1 = Me, R 2 = Ph (d)), in CH 2 Cl 2 afforded new closo (η 2 ,η 3 (4 vinylcyclopenten 3 yl))rhodacarboranes. The structures of the compounds were studied by multinuclear NMR spectroscopy. A probable mechanism of the rearrangement of the norbornadiene ligand is discussed.

Large-cage (11–13-vertex) dicarbon metallacarboranes of platinum metals with mono- and polycyclic diolefin ligands

“…More recently [98], a series of related closo-( 2 , 3 -vinylcyclopentenyl)rhodacarboranes 120(b-d: b, R = R 1 = H; c, R,R 1 = 1 ,2 -(CH 2 ) 2 C 6 H 4 ; d, R = CH 3 , R 1 = Ph) (including known 120a) were prepared in moderate to high yields by the direct reaction of NBD-rhodium complex 63 with the K + salts of the corresponding {nido-C 2 B 9 }-carborane monoanions. Scheme 45. Step-wise thermal transformation of agostic complex 106 into closo-( 5 -cyclopentadienyl)rhodacarborane derivative 121 [16].…”