Tertiary phosphine complexes of the f-block metals. Preparation of pentamethylcyclopentadienyl-tertiary phosphine complexes of ytterbium(II), ytterbium(III), and europium(II). Crystal structure of Yb(Me/sub 5/C/sub 5/)/sub 2/Cl(Me/sub 2/PCH/sub 2/PMe/sub 2/)

Journal Article · Wed Mar 16 00:00:00 EST 1983 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic00148a002· OSTI ID:6263668

Tilley, T D; Andersen, R A; Zalkin, A

The diphosphine, Me/sub 2/PCH/sub 2/CH/sub 2/PMe/sub 2/, reacts with M(Me/sub 5/C/sub 5/)/sub 2/(OEt/sub 2/) to give insoluble M(Me/sub 5/C/sub 5/)/sub 2/(Me/sub 2/PCH/sub 2/CH/sub 2/PMe/sub 2/), where M is Eu or Yb. In contrast, Me/sub 2/PCH/sub 2/PMe/sub 2/ gives the hydrocarbon-soluble complexes M(Me/sub 5/C/sub 5/)/sub 2/(Me/sub 2/PCH/sub 2/PMe/sub 2/), where M is Eu or Yb. The ytterbium complex reacts with YbCl/sub 3/ in toluene to give Yb(Me/sub 5/C/sub 5/)/sub 2/Cl(Me/sub 2/PCH/sub 2/PMe/sub 2/), and the crystal structure shows that the phosphine is acting as a monodentate ligand. Yb(Me/sub 5/C/sub 5/)/sub 2/Cl(Me/sub 2/PCH/sub 2/PMe/sub 2/) crystallizes in the monoclinic space group P2/sub 1//c with a = 16.358 (6) A, b = 8.595 (4) A, c - 20.712 (7) A, ..beta.. = 104.75 (4)/sup 0/, V = 2816 A/sup 3/, and d(calcd) = 1.45 g cm/sup -3/ for Z = 4 and mol wt = 615.15. Diffraction data were collected with a CAD-4 automated diffractometer, and the structure was refined to R = 0.054 for 3309 reflections with 4/sup 0/ < 2theta < 45/sup 0/ (Mo K..cap alpha.. radiation). The Yb is coordinated to the two Me/sub 5/C/sub 5/ groups, to the chlorine atom, and to one phosphorus atom of the bis(dimethylphosphino)methane ligand. The Yb-P and Yb-Cl distances are 2.94 and 2.53 A, respectively. The centroids of the C/sub 5/Me/sub 5/ ligands and the Cl and P atoms are in an approximate tetrahedral arrangement about the Yb atom.

• Research Organization: Univ. of California, Berkeley
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6263668
• Journal Information: Inorg. Chem.; (United States), Vol. 22:6
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
EUROPIUM COMPOUNDS
CRYSTAL STRUCTURE
STRUCTURAL CHEMICAL ANALYSIS
ORGANOMETALLIC COMPOUNDS
YTTERBIUM COMPOUNDS
BOND LENGTHS
CHEMICAL PREPARATION
CYCLOPENTADIENE
EXPERIMENTAL DATA
PHOSPHINES
ALKENES
CYCLOALKENES
DATA
DIENES
DIMENSIONS
HYDROCARBONS
INFORMATION
LENGTH
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOSPHORUS COMPOUNDS
POLYENES
RARE EARTH COMPOUNDS
SYNTHESIS
400201* - Chemical &amp; Physicochemical Properties
400301 - Organic Chemistry- Chemical &amp; Physicochemical Properties- (-1987)