Coordination mode and stability of the tetrahydroborate ligand in group 10 metal pincer complexes

Abstract

The coordination mode of the BH4- ligand in transition metal tetrahydroborate complexes is mainly dominated by the nature of the metal centres. However, other factors can also play important roles...

Evaluating the Catalytic Activities of PNCNP Pincer Group 10 Metal Hydride Complexes: Pd-Catalyzed Reduction of CO2 to the Formic Acid Level with NH3·BH3 and NaBH4 under Ambient Conditions

“…It is likely that the corresponding tetrahydroborate complex forms first in the reaction, which decomposes under the reflux condition to generate the hydride complex 1a . This is very common for pincer ligated transition-metal tetrahydroborate complexes . Complex 1a was fully characterized by multinuclear NMR, FTIR, crystallography analysis, HRMS, and elemental analysis.…”

Reactions of PNCNP and POCOP Pincer Platinum Hydride Complexes with Phenylacetylene and Carbon Disulfide: The Influence of the Pincer Backbone on the Structures of Unsaturated Auxiliary Ligands

“…The CS double bond in carbon disulfide can insert into most transition metal hydride bonds to form dithioformato complexes. , The coordination mode of the dithioformato ligand in the resulting insertion products can be either κ 1 - S -S 2 CH or κ 2 - S,S′ -S 2 CH depending on the nature of the metal center. We wondered whether there is any difference between 1a and 2a when they are reacted with carbon disulfide and how the PNCNP and POCOP pincer backbones influence the dithioformato auxiliary ligand in the resulting products.…”

“…The metal center in a pincer complex is effectively chelated by the pincer ligand, and the rigid pincer backbone can rarely be influenced by other auxiliary ligands. On the other hand, the structure and property of the auxiliary ligands can be significantly affected by the pincer platforms. , …”

“…On the other hand, the structure and property of the auxiliary ligands can be significantly affected by the pincer platforms. 4,5 Benzene-based bisphosphiamine (PNCNP) and bisphosphinite (POCOP) pincer ligands are among the most frequently used pincer platforms in pincer chemistry. Both of them can be very conveniently prepared by the reaction of 1,3diaminobenzene or resorcinol with 2 equiv of R 2 PCl (R = t Bu, i Pr, Ph, etc.)…”

Reactions and catalytic applications of a PNCNP pincer palladium hydride complex

“…We were interested in the structure, reactivity and catalytic applications of transition metal complexes supported by different types of pincer platforms. 6,14 The unique structural features of the PNCNP pincer platform encouraged us to initiate a study of the reactivity and catalytic applications of palladium( ii ) complexes supported by a benzene-based PNCNP pincer platform. We found that the hydride complex [2,6-( t Bu 2 PNH) 2 C 6 H 3 ]PdH ( 1 ) has very strong deprotonating ability and versatile catalytic activity; and the pincer backbone also exhibits good water stability.…”