Journal ArticleDOI
New Routes to a Series of σ-Borane/Borate Complexes of Molybdenum and Ruthenium
Rongala Ramalakshmi,Koushik Saha,Dipak Kumar Roy,Babu Varghese,Ashwini K. Phukan,Sundargopal Ghosh +5 more
TLDR
Natural-bond-orbital analyses of 5-7 indicate significant delocalization of the electron density from the filled σBH orbital to the vacant metal orbital.Abstract:
A series of agostic σ-borane/borate complexes have been synthesized and structurally characterized from simple borane adducts. A room-temperature reaction of [Cp*Mo(CO)3 Me], 1 with Li[BH3 (EPh)] (Cp*=pentamethylcyclopentadienyl, E=S, Se, Te) yielded hydroborate complexes [Cp*Mo(CO)2 (μ-H)BH2 EPh] in good yields. With 2-mercapto-benzothiazole, an N,S-carbene-anchored σ-borate complex [Cp*Mo(CO)2 BH3 (1-benzothiazol-2-ylidene)] (5) was isolated. Further, a transmetalation of the B-agostic ruthenium complex [Cp*Ru(μ-H)BHL2 ] (6, L=C7 H4 NS2 ) with [Mn2 (CO)10 ] affords a new B-agostic complex, [Mn(CO)3 (μ-H)BHL2 ] (7) with the same structural motif in which the central metal is replaced by an isolobal and isoelectronic [Mn(CO)3 ] unit. Natural-bond-orbital analyses of 5-7 indicate significant delocalization of the electron density from the filled σBH orbital to the vacant metal orbital.read more
Citations
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Journal ArticleDOI
Design, Synthesis, and Chemistry of Bis(σ)borate and Agostic Complexes of Group 7 Metals
Koushik Saha,Rongala Ramalakshmi,Suman Gomosta,Kriti Pathak,Vincent Dorcet,Thierry Roisnel,Jean-François Halet,Sundargopal Ghosh +7 more
TL;DR: To probe the potential formation of agostic complexes of the heavier group 7 metals, photolysis of M2 (CO)10 with Na[(H2 B)mp2] found that [M(CO)3 (μ-H)BH(C5 H4 NS)2 ] (5: M=Re; 6: M-n) was formed in moderate yield.
Journal ArticleDOI
Cooperative Molybdenum-Thiolate Reactivity for Transfer Hydrogenation of Nitriles
Shu-Fen Hou,Jia-Yi Chen,Minghui Xue,Mengjing Jia,Xiaofang Zhai,Rong-Zhen Liao,Chen-Ho Tung,Wenguang Wang +7 more
TL;DR: A half-sandwich molybdenum(II) thiolate complex with a η2-MeCN ligand was found to catalyze transfer hydrogenation of nitriles efficiently with ammonia as discussed by the authors.
Journal ArticleDOI
η4‐HBCC‐σ,π‐Borataallyl Complexes of Ruthenium Comprising an Agostic Interaction
TL;DR: All the new compounds have been characterized in solution by IR, NMR spectroscopy, mass spectrometry and the structural types were unequivocally established by crystallographic analysis of 2 b, 3 a-c and 5-7.
Journal ArticleDOI
Recent Advances in the Synthesis and Reactivity of Transition Metal σ-Borane/Borate Complexes.
TL;DR: In this paper, the Braunschweig and Ghosh groups have made significant contributions to elaborating the family of σ-borane/-borate complexes using two distinct approaches.
Journal ArticleDOI
Phosphoramidate‐Supported Cp*IrIII Aminoborane H2B=NR2 Complexes: Synthesis, Structure, and Solution Dynamics
TL;DR: For these complexes, solution- and solid-state, as well as DFT computational techniques, have been employed to substantiate B-N bond rotation of the coordinated aminoborane.
References
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