A Diborylcarbazolyl Ligand for Stabilizing Low-Coordinate and Low-Valent Metal Complexes
Yen-Hua Lee, Wei-Chieh Chang, Hsuan-Wen Fu, Han-Jung Li, Ting-Shen Kuo, Tzuhsiung Yang, Hsueh-Ju Liu
TL;DR
Scientists created a new ligand that helps stabilize metal complexes with unusual structures and low coordination numbers.
Contribution
A novel diborylcarbazolyl ligand was synthesized to support low-coordinate and low-valent metal complexes.
Findings
The ligand stabilizes two-coordinate and pseudo-one-coordinate metal complexes.
It forms trinuclear and coinage metal complexes with distinct geometries.
The ligand supports a range of transition metals including Fe, Co, Zn, Ni, Cu, Ag, and Au.
Abstract
We report the synthesis of a novel ligand L (3,6-di-tert-butyl-1,8-bis(dimesitylboryl)carbazolide) based on a carbazolyl scaffold bearing two sterically demanding boryl groups at the 1,8-positions. This diborylcarbazolyl framework effectively supports a range of transition metal complexes, including two-coordinate halide complexes LM II Cl [M = Fe (2), Co (3), and Zn (4)], trinuclear complex (LCr) 2 (CrCl 4 ) (5), and pseudo-one-coordinate complexes LM I [M = Ni (6) and Cu (7)]. Coinage metal complexes derived from L exhibit a preference for two-coordinate geometries, as demonstrated by the isolation of LMPPh 3 [M = Ag (8) and Au (9)] and LCu(DMAP) (10).
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Taxonomy
TopicsOrganoboron and organosilicon chemistry · Organometallic Complex Synthesis and Catalysis · Synthesis and characterization of novel inorganic/organometallic compounds