• Kumar, Dharmendra
• Das, Sharmistha
• Prakash, Prakash
• Ghosh, Prasenjit
• Datta, Anindya

Abstract

<p>A series of ruthenium complexes, namely, [{1-(NR1-2-acetamido)-3-(R2)-benzimidazol-2-ylidine}Ru(p-cymene)-Cl]Cl, where {R1 = 2,6-(i-Pr)2C6H3, R2 = i-Pr (1c); R1 = 2,6-(i-Pr)2C6H3, R2 = Et (2c); R1 = 2,4,6-(CH3)3C6H2, R2 = Et (3c)}, of benzimidazole-derived N/O-functionalized N-heterocyclic carbene ligands successfully carried out the cyanosilylation reaction of aromatic aldehydes and heteroaryl aldehydes with trimethylsilyl cyanide, providing good to excellent yields (ca. 60-95%) at room temperature under solvent-free condition. The ruthenium (1-3)c complexes were synthesized from the silver (1-3)b analogues in ca. 67-80% yields. The silver (1-3)b complexes exhibited an argentophilic d10 d10 interaction in its dinuclear macrometallacyclic motif, as observed by a short Ag Ag contact of 3.1894(3) Å in single-crystal X-ray diffraction studies for a representative silver complex 2b and also in photoluminescence studies that showed characteristic emission band(s) at ca. 534-536 nm in the CHCl3 solution and at ca. 482-487 and 530-533 nm in the solid state.</p>

Topics

• photoluminescence
• silver
• x-ray diffraction
• aldehyde
• Ruthenium