The synthesis, characterization, and fluxional behavior of a hydridorhodatetraborane

Diaw-Ndiaye, Fatou ; Sanz Miguel, Pablo J. (Universidad de Zaragoza) ; Rodríguez, Ricardo ; Macías, Ramón (Universidad de Zaragoza)

Resumen: The octahydridotriborate anion plays a crucial role in the field of polyhedral boron chemistry, facilitating the synthesis of higher boranes and the preparation of diverse transition metal complexes. Among the stable forms of this anion, CsB3H8 (or (n-C4H9)4N)[B3H8] have been identified. These salts serve as valuable precursors for the synthesis of metallaboranes, wherein the triborate anion acts as a ligand coordinating to the metal center. In this study, we have successfully synthesized a novel rhodatetraborane dihydride, [Rh(η2-B3H8)(H)2(PPh3)2] (1), which represents a Rh(III) complex featuring a bidentate chelate ligand fasormed by B3H8−. Extensive characterization of this rhodatetraborane complex has been performed using NMR spectroscopy in solution and X-ray diffraction analysis in the solid state. Notably, the complex exhibits intriguing fluxional behavior, which has been investigated using NMR techniques. Moreover, we have explored the reactivity of complex 1 towards pyridine (py) and dimethylphenylphosphine (PMe2Ph). Our findings highlight the labile nature of this four-vertex rhodatetraborane as it undergoes disassembly upon attack from the corresponding Lewis base, resulting in the formation of borane adducts, LBH3, where L = py, PMe2Ph. Furthermore, in these reactions, we report the characterization of new cationic hydride complexes, such as [Rh(H)2(PPh3)2 (py)]+ (2) and [Rh(H)2(PMe2Ph)4]+. Notably, the latter complex has been characterized as the octahydridotriborate salt [Rh(H)2(PMe2Ph)4][B3H8] (3), which extends the scope of rhodatetraborane derivatives.

Idioma: Inglés

DOI: 10.3390/molecules28186462

Año: 2023

Publicado en: Molecules 28, 18 (2023), 6462 [16 pp]
ISSN: 1420-3049

Factor impacto JCR: 4.2 (2023)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 77 / 231 = 0.333 (2023) - Q2 - T2
Categ. JCR: BIOCHEMISTRY & MOLECULAR BIOLOGY rank: 88 / 313 = 0.281 (2023) - Q2 - T1

Factor impacto CITESCORE: 7.4 - Pharmaceutical Science (Q1) - Analytical Chemistry (Q1) - Physical and Theoretical Chemistry (Q1) - Organic Chemistry (Q1) - Chemistry (miscellaneous) (Q1) - Drug Discovery (Q2) - Molecular Medicine (Q2)

Factor impacto SCIMAGO: 0.744 - Analytical Chemistry (Q1) - Pharmaceutical Science (Q1) - Chemistry (miscellaneous) (Q1) - Organic Chemistry (Q2) - Physical and Theoretical Chemistry (Q2) - Drug Discovery (Q2) - Medicine (miscellaneous) (Q2) - Molecular Medicine (Q3)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E05-23R
Financiación: info:eu-repo/grantAgreement/ES/MCIU-AEI-FEDER/PID2021-122406NB-I00

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)