Phosphine-Substituted Diborane(4)yl Complexes of Tungsten

نویسندگان

  • Holger Braunschweig
  • Holger Bera
  • Daniel Götz
  • Krzysztof Radacki
چکیده

The reaction of the 1,2-dihalodiborane(4) B2(NMe2)2Cl2 with the lithium tungsten salts Li[(η5C5H5)(R3P)(OC)2W] [R = Me (3a), Ph (3b)] yields via alkali salt elimination the phosphinesubstituted diborane(4)yl tungsten complexes [(η-C5H5)(R3P)(OC)2W-{B(NMe2)-B(NMe2)Cl}] [R = Me (4a), Ph (4b)]. Both compounds have been fully characterized in solution by NMR and IR spectroscopy and 4a additionally by X-ray diffraction analysis.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Phosphine-substituted sterically encumbered pyrrolyl ligands - synthesis and reactivity studies.

The sterically encumbered pyrrolyl KPyr(tBu2) (1-K, Pyr(tBu2) = 2,5-(Me3C)2C4H2N) reacts with PCl3, (iPr)2PCl and Ph2PCl exclusively at the C3-position to yield a series of phosphine-substituted pyrroles HPyr(tBu2R) (R = PCl2 (2-H), (iPr)2P (4-H) and Ph2P (5-H)). Pyrrole 2-H can further be functionalized with MeLi (3 equiv.) to yield LiPyr(tBu2PMe2) (3-Li). The coordination chemistry of these p...

متن کامل

Synthesis and Characterization of New Mercury (II) Complexes with Bidentate Chelating Schiff Base Iminopyridine Ligand

First, Schiff base iminopyridine ligands has been prepared by the condensation between primaryamines, different substituted anilines and active carbonyl group of pyridine carboxaldehyde, thenthe complexes [diiodo (3-ethylphenyl) pyridine-2-yl methylene amine] mercury(II), complex a,[dibromo (2,5-dimethylphenyl) pyridine-2-yl methylene amine] mercury(II) complex b, and[dinitrato bis-(2,6-dimethy...

متن کامل

μ3-Iodo-tri-μ3-sulfido-sulfidotris[tris­(4-methoxy­phen­yl)phosphine-κP]tri­copper(I)tungsten(VI) N,N-dimethyl­formide solvate

A new W/S/Cu cluster, [Cu(3)WIS(4)(C(21)H(21)O(3)P)(3)]·C(3)H(7)NO, was formed by the reaction of ammonium tetra-thio-tungstate(VI), cuprous iodide and tris-(4-methoxy-phen-yl)phosphine in N,N-dimethyl-formamide. The title compound exhibits a heavily distorted cubane-like skeleton in which the average Cu-I, Cu-S and W-μ(3)-S distances are 2.934, 2.302 and 2.249 Å, respectively. The W atom exhib...

متن کامل

Preparation of tris(azolyl)phosphine gold(I) complexes: digold(I) coordination and variation in solid state intermolecular interactionsw

Various tris(azolyl)phosphines R3P (R = 1-methylimidazol-2-yl, thiazol-2-yl, 4-methylthiazol-2-yl or 4,5-dimethylthiazol-2-yl) (1a–d) were utilised to prepare complexes of the type R3PAuCl (2a–d). The donor strength of the nitrogen atoms was assessed with natural-abundance N{H} NMR of 1a–c and 2a–c. The chloride of 2c could be successfully substituted by the anions BzS and NCS . Further utilisa...

متن کامل

Palladium(II) Phosphine-Ylide Complexes as Highly Efficient Homogeneous Pre-catalysts for the Ullmann Homocoupling Reaction of Aryl Halides

A highly efficient Ullmann homocoupling reaction of aryl halides using palladium (II) phosphine-ylide complexes as homogenous pre-catalysts under aerobic conditions has been developed without the need for any chemical co‐reducing agents. The procedure is relatively mild and appears to have broad applicability, being useful for the homocoupling of both electron-deficient and electron-rich aryl h...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006