Borylene cationic

Reaction of complex 30 with Ag[SbF6] in the presence of MeCN and ethanol yielded the cationic borylene complex [Os =BOEt(NMeCsH4N) MeCN(CO)(PPh3)2][SbF6] (38) with abstraction of the osmium bound... 

Scheme 6 Synthesis of a cationic borylene complex via halide abstraction...

Scheme 9 Synthesis of a cationic base-stabilized borylene complex...

Cationic Terminal Borylene Complexes Interconversion of Amino and Alkoxy Borylenes by an Unprecedented Meerwein-Ponndorf Hydride Transfer [80] ... 

A single bonded cationic terminal borylene complex [81] ... 

Synthesis and Structure of a Cationic Platinum Borylene Complex [84] ... 

The stabilization derived from n interaction between the nitrogen and boron atoms in amino(halo)boryl complexes has made them amenable to the generation of cationic borylene systems via halide abstraction methodology [81,82,268]. The first such use of amino-containing compounds for this purpose was documented in 2004, the reaction of 8.26 with Na[BAr ] being shown to generate [Cp Fe(CO)2B(NMe2)] + [BAr ] . Because of the... 

Figure 4.8 Calculated geometries (BP86/def2-TZVPP) of the carbones CL2 and isoelectronic nitrogen cation complexes (N )L2 and borylene complexes (BH)L2 with L=PPh3, NHC N2, CO, CAAC. Bond lengths in A, angles in degree. Experimental values are given in parentheses. The experimental values for...

Scheme 1 S.24 Formation of a stable borylene, boronium salt and radical cation [295].

A novel 3-borane-l-alkylimidazol-2-ylidene complex has been obtained by reaction of a 3-borane-l,4,5-trimethyl-imidazole-2-ylidene anion with GpFe(GO)2Br, A newly developed route to terminal borylene complexes makes use of halide abstraction to generate the first example of a cationic [L MBR] species. The compound so generated, [Gp Fe(GO)2(BMes)] [BAr 4] (Ar = G6H3(GF3)2-3,5), contains the shortest M-B distance yet reported, a feature indicative of a novel Fe=B double bond. 

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