Quenched gas-phase reactions of tetraborane(10), B₄H₁₀, with substituted alkynes: new nido-dicarbapentaboranes and arachno-monocarbapentaboranes

Abstract

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Boron

“…27 New alkyl derivatives of the nido-dicarbapentaborane, 1,2-C 2 B 3 H 7 , and arachno-carbapentaborane, 1-CB 4 H 10 , have been identified as the main volatile carbaborane products in quenched gas-phase reactions of tetraborane, B 4 H 10 , with alkyl-substituted acetylenes; RCRCR 0 (R = Me, Et, nPr or tBu, R 0 = H; R = Me or Et, R 0 = Me). 24 Treatment of the nido-cluster 1-CB 8 H 12 with NaBH 4 in THF at ambient temperature results in the formation and isolation of the stable [arachno-5-CB 8 H 13 ] À…”

“…120 The related ansa-borabenzene system (23) in which two borabenzene units are linked by the unique {B-CH 2 -P(Me 2 )-B} link has also been described. 121 A series of cationic 30 VE triple-decker complexes [Cp*Ru(m-Z 7 :Z 7 -C 5 B 2 Me 6 H)ML] + [ML = Co(C 4 Me 4 ), RuCp*, Rh(cod), and Ir(cod)] containing a bridging hexamethyl-4-borataborepine ligand have been obtained by the reaction of the sandwich compound Cp*Ru(Z 7 -C 5 B 2 Me 6 H) (24) with a range of cationic metal ligand complex fragments. 122 Triple decker complexes have also been synthesised by the reaction of the unusual pentylene analogue, K 2 [MeC(BPh) 2 N 2 (BPh 2 )CMe] with [{Cp*RuCl} 4 ] to form (25), the molecular structure of which has been reported.…”