Synthesis, chemistry, and electronic structures of group 9 metallaboranes

Borthakur, Rosmita ; Kar, Sourav ; Barik, Subrat Kumar ; Bhattacharya, Somnath ; Kundu, Gargi ; Varghese, Babu ; Ghosh, Sundargopal (2017) Synthesis, chemistry, and electronic structures of group 9 metallaboranes Inorganic Chemistry, 56 (3). pp. 1524-1533. ISSN 0020-1669

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Dimetallaoctaborane(12) of Ru, Co, and Rh have been well-characterized by a range of spectroscopic techniques and X-ray diffraction studies. Thus, reinvestigation of the Ir-system became of interest. As a result, a slight modification in the reaction conditions enabled us to isolate the missing Ir analogue of octaborane(12), [(Cp*Ir)2B6H10], 1. Compound 1 adapts a geometry similar to that of its parent octaborane(12) and Ru, Co, and Rh analogues. In [M2B6H10+x](M = Ru, x = 2; M = Co and Rh, x = 0), there exist two M–H–B protons. However, a significant difference observed in [(Cp*Ir)2B6H10] is the presence of two Ir–H instead of Ir–H–B protons that eventually controls the reactivity of this molecule. For example, unlike [M2B6H10](M = Co or Rh), the Ir-analogue does not react with metal carbonyl compounds or [Au(PPh3)Cl]. Along with 1, a closo trimetallic 8-vertex iridaborane [(Cp*Ir)3B5H4Cl], 2 was also isolated. Additionally, from another reaction, 12-vertex closo iridaboranes [(Cp*Ir)2B10Hy(OH)z], 3a and 3b (3a: y = 12, z = 0; 3b: y = 8, z = 2), have also been isolated. Further, density functional theory calculations were performed to gain useful insight into the structure and stability of these compounds.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:108950
Deposited On:31 Jan 2018 12:23
Last Modified:31 Jan 2018 12:23

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