Versatile Coordination Modes of 2,6‐Bis(2‐(diphenylphosphanyl)‐1H‐imidazol‐1‐yl)pyridine in Cu(I) and Au(I) Complexes

Abstract

Synthesis, and copper(I) and gold(I) complexes of imidazole-based bisphosphine, [2,6-(PPh 2 C 3 H 2 N 2) 2 C 5 H 3 N] are described. Reactions of [2,6-(PPh 2 C 3 H 2 N 2) 2 C 5 H 3 N] with one equivalent of CuX (X = Cl, Br or I) yielded either monomeric [{2,6-{PPh 2 C 3 H 2 N 2 } 2 C 5 H 3 N}{CuI}], dimeric [{PPh 2 C 3 H 2 N 2 } 2 C 5 H 3 N}-{CuCl}] 2 , or one-dimensional (1D) polymeric [{2,6-(PPh 2-C 3 H 2 N 2) 2 C 5 H 3 N}{Cu 3 Br 2 }] n Cl complexes. Coordination polymer [{2,6-(PPh 2 C 3 H 2 N 2) 2 C 5 H 3 N}{Cu 3 Br 2 }] n Cl is a rare example containing alternately arranged copper atoms having tetrahedral and linear geometries. The repeating unit consists of imidazolyl [a

Transition Metal Complexes of 2,6‐Dibenzhydryl Derived Bisphosphine: Synthesis, Structural Studies and Palladium Complex Promoted Suzuki‐Miyaura Reactions

“…The metal centres in 4 and 5 adopt slightly distorted square planar geometries as supported by the ∠Cl−Pd−P bond angles in 4 (86.79(3)° and 88.99(3)°) and ∠Cl−Pt−P bond angles in 5 (92.01(3)° and 87.91(2)°). The ∠P1−M1−P2 bite angles of 91.38(3)° for 4 and 92.26(2)° for 5 , are considerably shorter than the same found in analogous complexes [{2,6‐{PPh 2 C 3 H 2 N 2 } 2 C 5 H 3 N}{MCl 2 } ‐κ 2 ‐P , P ] [M=Pd; 102.43(4)°, M=Pt; 104.07(2)°] [14] and [{(C 5 H 5 ) 2 Fe}N(CH 2 PPh 2 ) 2 (MCl 2 ) ‐κ 2 ‐P , P ] [ M=Pd; 94.53(4)°, M=Pt; 95.92(3)°] [9b] . The Pd−P bond distances in 4 [2.2398(9) Å and 2.2260(9) Å] are shorter than those found in complexes [PdCl 2 (Xantphos)] [15] (Pd−P avg 2.295(3) Å) and [PdCl 2 (dppf)] [16] (Pd−P avg 2.292(3) Å) and [PdCl 2 (dppp)] [17] (Pd−P avg 2.244(1) Å) [18] .…”

Copper(I) Complexes of Amide Functionalized Bisphosphine: Proximity Enhanced Metal–Ligand Cooperativity and Its Catalytic Advantage in C(sp3)–H Bond Activation of Unactivated Cycloalkanes in Dehydrogenative Carboxylation Reactions

“…1 H NMR (400 MHz, CDCl 3 ): δ 5.96 (dd, J = 10.0, 1.3 Hz, 1H), 5.75−5.66 (br d, 1H), 5.33−5.24 (br m, 1H), 2.29 (t, J = 7. 4 Hz, 2H), 2.14−1.94 (m, 2H), 1.81−1.72 (m, 2H), 1.70−1.61 (m, 2H), 1.28 (br d, J = 11.5 Hz, 2H), 0.96 (m, 3H). 13 C NMR (101 MHz, CDCl 3 ): δ 173.3, 132.…”

“…Copper­(I) complexes of phosphorus­(III)-based ligands have received considerable attention in the last few decades owing to their structural diversity, rich photophysical properties, and catalytic applications . Copper­(I) halides have the remarkable ability to form a variety of mono-, di-, tri- or tetranuclear complexes and 1D, , 2D, or 3D coordination polymers depending upon the ligand structures and their conformational flexibilities.…”

Structural Diversity and Rare η1 Cu–C Interactions in CuI Complexes of 1,2,3-Triazole-Functionalized Bisphosphines

“…31 ,66.28;H,4.25;N,5.73. Found: C,66.39;H,4.12; N, 5.86%. 1 H NMR (400 MHz, DMSO) δ 7.70 (s, 8H), 7.35 (t,J = 36.5 Hz,7H),13H),6.62 (dd,J = 11.8,5.8 Hz,1H).…”

“…Calcd for C 76 H 58 Cu 2 Br 2 N 6 P 4 : C, 62.26; H, 3.99;N,5.73. Found: C,62.15;H,4.12; N, 5.65%. 1 H NMR (400 MHz, CDCl 3 ) δ 7.99 (s, 3H), 7.86− 7.26 (m, 12H), 7.25−6.76 (m, 13H), 6.74−6.68 (m, 1H).…”