Synthesis, Structural Characterization, and Luminescence of New Silver Aggregates Containing Short Ag−Ag Contacts Stabilized by Functionalized Bis(N-heterocyclic carbene) Ligands

2007 ◽  
Vol 26 (15) ◽  
pp. 3660-3667 ◽  
Author(s):  
Bin Liu ◽  
Wanzhi Chen ◽  
Shouwen Jin
Keyword(s):  
Structural Characterization ◽  
Carbene Ligands

Structural Characterization, Solution Dynamics, and Reactivity of Palladium Complexes with Benzimidazolin- 2-ylidene N-Heterocyclic Carbene Ligands

2014 ◽  
Vol 2014 (12) ◽  
pp. 2131-2139 ◽  
Author(s):  
Stephan Hohloch ◽  
Naina Deibel ◽  
David Schweinfurth ◽  
Wolfgang Frey ◽  
Biprajit Sarkar
Keyword(s):  
Structural Characterization ◽  
Palladium Complexes ◽  
Carbene Ligands ◽  
Solution Dynamics

Synthesis and structural characterization of iridium(I) complexes of 20-membered macrocyclic rings bearing chelating bis(N-heterocyclic carbene) ligands

2019 ◽  
Vol 75 (12) ◽  
pp. 1652-1657
Author(s):  
Rajesh Thapa ◽  
Stefan M. Kilyanek
Keyword(s):  
Structural Characterization ◽  
Macrocyclic Ligands ◽  
Iridium Complex ◽  
Amine Group ◽  
Carbene Ligands ◽  
Bimetallic Complex ◽  
Amine Groups

The reactivities of two 20-membered macrocyclic ligands, each containing two N-heterocyclic carbene (NHC) and two amine groups, towards [IrCl(COD)]2 (COD is cycloocta-1,5-diene) were investigated. Macrocycles containing imidazolin-2-ylidene groups formed the monometallic complex [(1,2,5,6-η)-cycloocta-1,5-diene](5,16-dibenzyl-1,5,9,12,16,20-hexaazatricyclo[18.2.1.19,12]tetracosa-10,21-dien-21,22-diylidene)iridium(I) bromide dichloromethane monosolvate, [Ir(C8H12)(C32H42N6)]Br·CH2Cl2, 2a. The structure of iridium complex 2a at 100 K has triclinic P\overline{1} symmetry. The ligand in 2a coordinates to the Ir center through the NHC moieties in a cis fashion. Additionally, the ligand adopts an umbrella-like structure that appears to envelope the Ir center. The structure displays C—H...Br interactions. Macrocycles containing benzimidazolin-2-ylidene groups formed the bimetallic complex [μ-5,20-dibenzyl-1,5,9,16,20,24-hexaazapentacyclo[22.6.1.19,16.010,15.025,30]dotriaconta-10(15),11,13,25(30),26,28-hexaene-31,32-diylidene]bis{bromido[(1,2,5,6-η)-cycloocta-1,5-diene]iridium(I)}, [Ir2Br2(C8H12)2(C40H46N6)], 2b. The structure of complex 2b at 100 K has orthorhombic Pbca symmetry. Each NHC moiety in 2b coordinates in a monodentate fashion to an Ir(COD) fragment. The structure exhibits disorder of the main molecule. This disorder is found in the portion of the macrocycle containing an amine group. This structure also displays C—H...Br interactions. Finally, the structure of the hexafluorophosphate salt of the imidazolin-2-ylidene-containing macrocycle, namely 5,16-dibenzyl-1λ5,5,9,12λ5,16,20-hexaazatricyclo[18.2.1.19,12]tetracosa-1(23),10,12(24),21-tetraene-1,12-diium bis(hexafluorophosphate), C32H44N6 2+·2PF6 −, 1c, was determined. The structure of macrocycle 1c at 100 K has triclinic P\overline{1} symmetry and was found to contain C—H...F interactions.

scholarly journals Synthesis and structural characterization of 20-membered macrocyclic rings bearing trans-chelating bis(N-heterocyclic carbene) ligands and the catalytic activity of their palladium(ii) complexes

2019 ◽  
Vol 48 (33) ◽  
pp. 12577-12590 ◽  
Author(s):  
Rajesh Thapa ◽  
Stefan M. Kilyanek
Keyword(s):  
Catalytic Activity ◽  
Coordination Chemistry ◽  
Structural Characterization ◽  
Metal Coordination ◽  
Carbene Ligands

20-Membered macrocyclic rings containing NHCs and amines were synthesized, and their late metal coordination chemistry explored.

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