Tris-2-(3-methylindolyl)phosphine as an anion receptor

Abstract

A C3-symmetric phosphine with indolyl substituents has been synthesized that demonstrates the capability to bind anions through the indole NH sites and coordinate metal centres through the phosphorus centre.

Coordination of 3‐Methylindole‐Based Tripodal Tetraphosphine Ligands to Iron(+II), Cobalt(+II), and Nickel(+II) and Investigations of their Subsequent Two‐Electron Reduction

“…Subsequently, we explored the coordination of FeCl 2 to the PP 3 ligands L1 CF3 , L1 OMe , L2 H , and L3 i Pr in the presence of NaBF 4 (Figure ) to form complexes 4 , 5 , 6 , and 7 , respectively. The new ligand L3 i Pr was prepared by reacting the lithium salt of tris‐2‐(3‐methylindolyl)phosphine with diisopropyl chlorophosphine. Coordination of ligands other than L1 H to iron in presence of NaBF 4 did not provide the monometallic complex [Fe(Cl) L ]BF 4 quantitatively as indicated by the presence of free ligand in the filtrate in the 31 P NMR spectrum.…”

Second sphere coordination in fluoroanion binding: Synthesis, spectroscopic and X-ray structural study of [Co(phen)2CO3](Pfbz)·6H2O

“…Such endeavors directly or indirectly bring the design and synthesis of anion receptors close to the realm of supramolecular chemistry and profitably utilize the understanding that has been gathered through decades of research on the ''chemistry beyond molecules'' [1][2][3][4][5][6][7][8][9][10]. We [11][12][13][14][15][16] and others [17][18][19][20][21][22] have used these interactions towards anion binding, yet harnessing all the knowledge associated with the binding features of anions is in its incipient stage compared to their cationic counterparts. This inherent difficulty is due to the varied size, shape and pH sensitivity of anions as compared with metal ions.…”

3-Methylindole-Based Tripodal Tetraphosphine Ruthenium Complexes in N2 Coordination and Reduction and Formic Acid Dehydrogenation

“…The new ligands L1 CF3 and L1 OMe were prepared in a similar way to L1 H , by reacting tris-2-(3-methylindolyl)phosphine [17] with the corresponding chlorodiarylphosphine ( Figure 1). Inorganics 2017, 5, 73 2 of 18 known structural isomer, L2 H ( Figure 2) [14], in which the central P-donor is bound to the three nitrogen atoms of the 2-(3-methylindolyl)diphenylphosphine moiety, was also used in these studies.…”

“…The new ligands L1 CF3 and L1 OMe were prepared in a similar way to L1 H , by reacting tris-2-(3-methylindolyl)phosphine [17] with the corresponding chlorodiarylphosphine ( Figure 1). …”

“…The isolated low oxidation state Ru I ClL1 H and Ru 0 (N 2 )L1 H complexes revealed interesting one-electron reactivity, as they were able to abstract chlorine atoms from either chloroform or dichloromethane, leading to formation of the corresponding Ru II complex. In this paper, we expand the coordination chemistry of ruthenium and 3-methylindole-based ligands [17][18][19][20][21][22][23] and investigate how modification of the ligand scaffold and its electronic properties influence the stability and activity of these complexes in dinitrogen coordination and subsequent reduction as well as in formic acid dehydrogenation. Ligand L1 H was modified using functionalized P(Ar) 2 units, wherein the arene carries either electron-withdrawing -CF 3 groups (L1 CF3 ) or electron-donating -OMe groups (L1 OMe ) in the para-position (Figure 1).…”