Zinc complexes incorporating with symmetrical and asymmetrical polydentate nitrogen-donor pyrrolyl ligands: Synthesis, characterization, and ring-opening polymerization

2,5-Bis[(dimethylamino)methyl]-1H-pyrrole

“…It is in a liquid state at room temperature. Many organometallic compounds formed by this auxiliary ligand with aluminium (Liu et al, 2013) and zinc (Hsiao et al, 2012) or transition metals including Ti (Li et al, 2005), Zr (Hsu et al, 2012), Hf (Lee et al, 2011), Ga (Wang et al, 2013), In (Kuo et al, 2003, Y (Kuo et al, 2005) and Mo (Huang et al, 2001) have been reported and there are several reports of the crystal structures of organometallic compounds containing 2,5-bis[(dimethylamino)methylene]-1H-pyrrole as a ligand (Xia et al, 2002;Lee et al, 2011;Chang et al, 2011;Wang et al, 2012). However, although 2,5-bis[(dimethylamino)methylene]-1H-pyrrole has been prepared and studied for a long time, its crystal structure has not been reported so far.…”

Synthesis and structures of tantalum chloride and tantalum aryloxide compounds bearing bidentate and tridentate pyrrole‐amine ligands

“…[ 21–28 ] Since this class of ligands are fundamentally multidentate in nature and well competent for the formation of metal clusters, we previously studied the reactivity of a large variety of substituted pyrrole‐assisted metal complexes. [ 29–35 ] In this article, we introduce a series of substituted bidentate and tridentate pyrrole ligands (as shown in Scheme 2) to the tantalum atom subjecting the new tantalum compounds. Subsequently, we propose the aryloxide ligands to the tantalum compounds via metathesis method.…”