Reactions of B 2 ( o ‐tolyl) 4 with Boranes: Assembly of the Pentaborane(9), HB[B( o ‐tolyl)(μ‐H)] 4 (original) (raw)
Related papers
Recent developments in bisdiborane chemistry: B–C–B, B–C–C–B, B–C C–B and B–C C–B compounds
An overview of the development of new strategies in organic synthesis with a minimum of chemical steps is becoming increasingly necessary for the efficient assembly of complex molecular structures. Therefore, the combination of multiple reactions in a single operation represents a particularly efficient approach. Among these strategies, the synthesis and reactivity of bisdiboranes has never been reviewed although its popularity for the synthesis of complex architectural molecules has been steadily increasing during the last decade. This review is intended to highlight the use of partly geminated boranes (B–C–B), and also bisdiborane reagents (B–C–C–B, B–C C–B, B–C C–B).
Angewandte Chemie International Edition, 2014
A series of novel Cp*-based (Cp* = h 5-C 5 Me 5) agostic, bis(s-borate), and boratrane complexes have been synthesized from diruthenium and dirhodium analogues of pentaborane(9). The synthesis and structural characterization of the first neutral ruthenadiborane(6) analogue are also reported. This new route offers a very efficient method for the isolation of bis(s-borate) and agostic complexes from diruthenapentaborane(9). The field of transition-metal-boron chemistry, comprising a wide range of compounds from higher-nuclearity metallaborane clusters to complexes with a single boron atom, has undergone a renaissance over the past few decades. [1, 2] Complexes with a wide variety of coordination modes have been isolated and structurally characterized, [1-5] for example, s-borane, [3, 4] boryl, [1a] and borylene complexes, [1a] metallaboranes, [1b, 2] metallaboratranes, [5] and more. [1a, 3c, 4b] Among the various novel types recognized, the electron-precise transition-metal agostic and s-borane complexes (Scheme 1), in which borane s-donation to the metal center dominates over p-back-donation, have been a subject of regular importance. [3, 4, 6] However, the lack of a simple and practical Scheme 1. Various modes of metal-boron interaction.
Dalton Transactions, 2015
The unsymmetrical diborane(4) pinB-B((RN) 2 (C 6 H 4)) (R = Me, Bn) reacts with [(Me 3 P) 4 Rh-X] (X = Me, OtBu) giving predominantly either [(Me 3 P) 4 Rh-Bpin] or [(Me 3 P) 3 Rh-B((RN) 2 (C 6 H 4))] depending on X. At low temperatures in the presence of excess PMe 3 the unprecedented equatorial boryl complex [(Me 3 P) 4 Rh-B((MeN) 2 (C 6 H 4))] is formed. Scheme 1 General synthesis and two examples of [(R 3 P) n Rh-B(OR) 2 ] complexes. 2 † Electronic supplementary information (ESI) available: All experimental and analytical data as well as additional crystallographic and NMR spectroscopic material. CCDC 1037662-1037666. For ESI and crystallographic data in CIF or other electronic format see