[1,2-Bis(diisopropylphosphino)-1,2-dicarba-closo-dodecaborane-κ²P,P′]dichloridomercury(II)

Abstract

In the title complex, [HgCl2(C14H38B10P2)], the HgII atom is in a distorted HgCl2P2 tetra­hedral coordination environment. The chelation of the Hg atom by two P atoms and two C atoms from the carborane skeleton results in a nearly planar five-membered ring.

The novel 1D chain and 3D network of mercury carborane–diphenylphosphine complexes constructed by covalent bond or hydrogen bond interactions

“…In the [HgCl 2 {1,2-(PPh 2 ) 2 -1,2-C 2 B 10 H 10 }] unit, the Hg1 center is a four-coordinate tetrahedral geometry, with two P atoms of 1,2-(PPh 2 ) 2 -1,2-C 2 B 10 H 10 ligand and two Cl atoms in the apical position accomplishing the coordination sphere. The average bond length of Hg1-P and Hg1-Cl are 2.590 and 2.466 Å, respectively, which are all consistent with the corresponding bond lengths 2.522(1) and 2.451(4) Å found in the reported complex [HgCl 2 (1,2-(P i Pr 2 ) 2 -1,2-C 2 B 10 H 10 )], respectively [23]. The bond lengths of Cc-P in 1 1.882(17) and 1.855 (18) Å are in agreement with that of 1.885 Å for the free ligand 1,2-(PPh 2 ) 2 -1,2-C 2 B 10 H 10 [26], suggesting that the coordinating to the metal atom has no obvious influence on this distance.…”

“…Additional, we have also investigated the reactions of the ligand 1,2-(P i Pr 2 ) 2 -1, 2-C 2 B 10 H 10 with CuX (X = Cl, Br and I), and obtained three isostructural dinuclear copper(I) complexes with the molecular formula [Cu 2 (l-X) 2 (1,2-(P i Pr 2 ) 2 -1,2-C 2 B 10 H 10 ) 2 ], in which the Xbridged (X = Cl, Br and I) dimers are linked into novel 2D supermolecular networks through C-HÁÁÁH-B dihydrogen bonds (DHBs) interactions between the isopropyl groups and the carborane cages [22]. As known to us, the Hg complex of carborane organophosphorus-substituents ligands is still very rare [23], although many other transition metal complexes based on carborane-diphenylphosphine ligand have been reported. Here, we present two novel Hg complexes, [Hg 2 {1,2-(PPh 2 ) 2 -1,2-C 2 B 10 H 10 } 2 (l-Cl 2 ) 2 (l-HgCl 2 ) 3 ]Á 2CH 2 Cl 2 (1) and [HgCl(PPh 3 ){7,8-(PPh 2 ) 2 -7,8-C 2 B 9 H 10 }] (2).…”