Group 6 metal carbonyl complexes of 1,5-diselena[5]ferrocenophane: Synthesis, characterization, crystallographic and electrochemical study

A novel macrocyclic diselenoether containing naphathalene ring and its Mo(0) tetracarbonyl complex: Synthesis, crystal structures and fluorescence study

“…So the equatorial M-C bonds trans to the M-Se bonds are significantly shorter than the two axial M-C bonds, reflecting the fact that the two M-Se bonds result in more electron density being available for back-bonding to the two equatorial carbonyls. Mo-CtransSe are slightly longer than those in [Mo(CO)4 (1,5-diselena[5]ferrocenophane)] (1.942(7) Å, 1.928(7) Å)[9].The back-bonding induces a filling of the carbonyl π* level, which causes a weakening of the C-O bond. In the structure of [Mo(CO) 4 L], Synthetic route for L. View of the structure of L with the atomic numbering scheme adopted.…”

“…There is no stable complex isolated that has this kind of selena-macrocycles as a ligand. In our group, a series of macrocyclic polyselena[n]ferrocenophanes have been synthesized and studied, which display strong affinities with soft Lewis metals [8][9][10][11]. In light of this, we now initiate the systematic study of selenamacrocycles incorporating fluorophore.…”

“…Two sets of signals are observed in the 1 H and 13 C NMR spectra. In the analogous complexes of 1,5-diselena [5]ferrocenophane [9], only one set of signal exists due to the ring strain and the prohibition of the ring reversal process. The insertion of methalene group between Se and naphthalene in L may give the chance of inversion shown in Fig.…”

Synthesis and Study of Three Novel Macrocyclic Selena[n]ferrocenophanes Containing a Naphthalene Unit

“…In contrast, polyselena[ n ]ferrocenophanes have drawn less attention possibly due to the difficulty of their preparation . Our lab has embarked upon design of this class of ligands . As a result of the macrocyclic effect, a suitable cavity size, and incorporation of soft donor Se atoms, they have proven to coordinate well to late transition metals.…”