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Syntheses, Structures and Spectroscopic Studies of Quadruply Bonded Complexes Containing Bridging Acetate and η 3 ‐etp Ligands (etp = Ph 2 PCH 2 CH 2 P(Ph)CH 2 CH 2 PPh 2 )
Author(s) -
Suen MawCherng,
Chiang ShihFu,
Chen JhyDer,
Chern ShuennShing,
Hsiao ChwanDeng
Publication year - 1998
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199800042
Subject(s) - chemistry , halogen , crystallography , denticity , phosphine , crystal structure , stereochemistry , nmr spectra database , chemical shift , nuclear magnetic resonance spectroscopy , x ray crystallography , spectral line , alkyl , physics , organic chemistry , astronomy , catalysis , biochemistry , optics , diffraction
The quadruply bonded complexes containing bridging acetate and polydentate phosphine ligands of the type Mo 2 (O 2 CCR 3 )X J (η 3 ‐etp) (R = H, X = Br, 1; R = F, X = CI, 2; R = F, X = Br, 3; etp = Ph 2 PCH 2 CH 2 P(Ph)CH 2 CH 2 PPh 2 ) were prepared by reactions of Mo 2 (O 2 CCR 3 )X 2 (PPh 3 ) 2 with etp in CH 2 X 2 . Their UV‐vis and 31 P{ 1 H}‐NMR spectra have been recorded, and the structure of 1 has been determined by X‐ray crystallography. Crystal data for 1·2CH 2 Br 2 : space group P2 1 /c, a = 13.924(7) Å, b = 21.157(4) Å, c = 14.427(5) Å, β = 101.82(3)°, V = 4159(2) Å 3 , Z = 4, with final residuals R = 0.0797 and Rw = 0.0793. The absorption wavelengths of the δ → δ* transitions and the chemical shifts and the coupling constants of the 31 P{ 1 H}‐NMR spectra of these complexes are dependent on the natures of the halogen atoms and the acetate ligands.