A highly active two six-membered phosphinite palladium PCP pincer complex [PdCl{C6H3(CH2OPPri)2-2,6}]

An unprecedented bonding mode for potassium within a PCP-pincer palladium hydride–K-Selectride® complex

“…The stability imparted by these trans-spanning pincer ligands have been shown to be highly effective in preparing tridentate complexes of transition metals, including square-planar, d 8 metal species. More specifically, the socalled ''PCP" pincer ligands have attracted a great deal of attention for their use in a variety of catalytic reactions, as exemplified by recent advances in alkane dehydrogenation [6][7][8][9][10][11], olefin metathesis [12], Heck reaction chemistry [4,[13][14][15][16], and stereospecific Aldol condensations [17]. The naming of these ligands as ''PCP" follows the typical convention of listing the atoms using points of attachment to the metal.…”

Recent Applications of Phosphinite POCOP Pincer Complexes Towards Organic Transformations

“…In 2007 Naghipour and Jensen [18] synthesized complex 5 (Fig. 10) in a similar manner as that of complex 3.…”

Synthesis and characterization of six-membered pincer nickelacycles and application in alkylation of benzothiazole

“…Nevertheless, Jensen demonstrated the six-membered ring palladacycle as an excellent catalyst for the Heck coupling reaction compared to the five-membered palladacycle counterpart. 15 Encouraged by the Jensen observation, and as a part of our activity on the development of pincer-based nickel complexes for the C-H bond functionalization, 10g, 16 herein, we report the synthesis and structural characterization of six-membered nickelacycles…”

“…was synthesized according to previously described procedure. 15 All other chemicals were obtained from commercial sources, and were used without further purification. Yields refer to the isolated compounds, estimated to be > 95% pure as determined by 1 H-NMR.…”

“…The 1,3-i Pr 2 POCH 2 -C 6 H 4 -CH 2 OP i Pr 2 [( i Pr 4 -POCCC OP) − H, (1)] ligand was prepared by following the literature procedure. 15 Treatment of the pro-pincer ligand 1 with (CH 3 CN) 2 NiBr 2 in the presence of triethylamine afforded the pincer complex, {κ P , κ C , κ P -(2-i Pr 2 POCH 2 -C 6 H 3 -6-CH 2 OP i Pr 2 )}NiBr, [( i Pr 4 -POCCCOP)NiBr] (2) via the C(2)-H bond activation on the ligand, ( i Pr 4 -POCCCOP)-H (Scheme 1). The complex 2 was obtained as a brownish yellow solid.…”