Coordination properties of N2S (1,5-bis(3,5-dimethyl-1-pyrazolyl)-3-thiapentane) or N2S2 (1,8-bis(3,5-dimethyl-1-pyrazolyl)-3,6-dithiaoctane or 1,2-bis[3-(3,5-dimethyl-1-pyrazolyl)-2-thiapropyl]benzene) donor ligands toward Rh(I)
loses one molecule of carbonmonoxide to give [3][BF4]. The latter is prone to react with carbonmonoxide to partially regenerate [2][BF4]. The ligands 1,2-bis[3-(3,5-dimethyl-1-pyrazolyl)-2-thiapropyl]benzene (bddf) and 1,8-bis(3,5-dimethyl-1-pyrazolyl)-3,6-dithiaoctane (bddo) are seen to react with two equivalents of [Rh(COD)(THF)2][BF4] to give the dinuclear complexes [Rh2(bddf)(COD)2][BF4]2 ([4][BF4]2)
Unusual behaviour of the thioether function of the ligand 1,8-bis(3,5-dimethyl-1-pyrazolyl)-3,6-dithiaoctane (bddo) towards transition-metal salts. X-Ray structures of a green and a red modification of [Cu(bddo)Cl2]
作者:Willem G. Haanstra、Wilfred A. J. W. van der Donk、Willem L. Driessen、Jan Reedijk、John S. Wood、Michael G. B. Drew
DOI:10.1039/dt9900003123
日期:——
molecules, thus forming chains with distinct C2 symmetry perpendicular to the chain axis. The copper atom is co-ordinated in a distorted-tetrahedral geometry by two pyrazole nitrogens and two chloride atoms in cis positions. The sulphur atoms do not participate in the co-ordination, although molecular-mechanics calculations show that the ligand bddo is not sterically hindered to form tetradentate mononuclear
Unusual chelating properties of the ligand 1,8-bis(3,5-dimethyl-1-pyrazolyl)-3,6-dithiaoctane (bddo). Crystal structures of Ni(bddo)(NCS)<sub>2</sub>, Zn(bddo)(NCS)<sub>2</sub>and Cd<sub>2</sub>(bddo)(NCS)<sub>4</sub>
作者:Willem G. Haanstra、Willem L. Driessen、Jan Reedijk、Urho Turpeinen、Reijo Hämäläinenn
DOI:10.1039/dt9890002309
日期:——
Zn(bddo)(NCS)2 crystallizes from ethanol in the orthorhombic space group Pbcn with unit-cell dimensions a= 9.521(1), b= 14.835(5), c= 16.840(4)Å, for Z= 4. The structure was refined to R= 0.058 and R′= 0.069 for 1 072 unique reflections with I > 2σ(I). The compound consists of chains of zinc atoms linked by ligand molecules. The zinc ion is tetrahedrally co-ordinated by two pyrazole nitrogen atoms and two
Tuning the hemilabile behaviour of a thioether–pyrazole ligand on Pd(II) complexes with diphosphines
作者:Antonio de León、José Antonio Ayllón、Josefina Pons
DOI:10.1016/j.jorganchem.2011.10.003
日期:2012.1
The coordination mode of thioether-pyrazole ligand, 1,5-bis(3,5-dimethyl-1-pyrazolyl)-3-thiapentane (bdtp) and 1,8-bis-(3,5-dimethyl-1-pyrazolyl)-3,6-dithiaoctane (bddo) ligands, in Pd(II) complexes containing a diphosphine ligand is determined by subtle changes in size of the bridge between the two phosphorus atoms. The (1)H NMR and (31)P(1)H} NMR at variable temperature in acetonitrile solution prove that the hemilabile character of the bdtp ligand depend on the diphosphine ligand. Thus, while in [Pd(bdtp)(dppe)](BF(4))(2) [1](BF(4))(2) the thioether group not participate in the Pd(II) coordination sphere, two isomers with different coordination (P(2)N(2) vs P(2)NS) are in equilibrium in [Pd(bdtp)(dppp)](BF(4))(2) [2](BF(4))(2) acetonitrile solution. For complexes [Pd(bddo)(dppe)](BF(4))(2) [3](BF(4))(2) and [Pd(bddo)(dppp)](BF(4))(2) [4](BF(4))(2), only the coordination N,N is observed. (C) 2011 Elsevier B.V. All rights reserved.
Haanstra, W. G.; Driessen, W. L.; Reedijk, J., Acta Crystallographica, Section C: Crystal Structure Communications, 1992, vol. 48, p. 1405 - 1407
作者:Haanstra, W. G.、Driessen, W. L.、Reedijk, J.、Wood, J. S.