Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.COA of Formula: C34H28FeP2, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 12150-46-8, in my other articles.
A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene, molecular formula is C34H28FeP2. In a Article，once mentioned of 12150-46-8, COA of Formula: C34H28FeP2
Four kinds of metal carbonyl complexes with 1,1′-bis(diphenylphosphino)ferrocene (dppfe) are synthesized and their molecular structures are determined by single-crystal X-ray analyses.Crystal data for (eta5-CH3C5H4)Mn(CO)2dppfe (1), (eta5-CH3C5H4)Mn(CO)dppfe (2), 2(mu-dppfe) (3), and CH3CCo3(CO)7dppfe (4) are as follows: 1, Pbca, a=20.551(3), b=28.951(5), c=11.786(1) Angstroem, V=7012(2) Angstroem3, Z=8; 2, P21/n, a=18.682(5), b=20.495(4), c=9.750(2) Angstroem, beta=91.24(2) deg, V=3732(1) Angstroem3, Z=4; 3, A2/a(C2/c), a=18.978(5), b=15.293(4), c=16.513(5) Angstroem, beta=112.62(2) deg, V=4423.9(2) Angstroem3, Z=4; 4, PI<*>, a=13.031(2), b=15.338(2), c=11.583(2) Angstroem, alpha=99.13(2) deg, beta=98.35(2) deg, gamma=99.64(2) deg, V=2218.1(7) Angstroem3, Z=2; Mo Kalpha radiation; R=0.075, 0.084, 0.074, and 0.056 for 2639, 4219, 2575, and 6098 reflections, respectively.Dppfe functions as a monodentate ligand in 1 with the rotational angle 128.0 deg for two cyclopentadienyl rings, as a bidentate chelating ligand in 2 with the rotational angles 3.1 deg, as a bidentate bridging ligand (no metal-metal bond) in 3 with the rotational angle 180 deg, and as a bridging ligand (over metal-metal bond) in 4 with the rotational angle 69.6 deg, respectively; Mn-P=2.242(4) Angstroem (1), Mn-P=2.215(2) and 2.216(3) Angstroem (2), Mn-P=2.364(4) Angstroem (3), and Co-P=2.297(2) and 2.314(2) Angstroem (4).The two cyclopentadienyl rings of dppfe are slightly tilted (2.3-5.7 deg tilt angles in 1, 2, and 4) and are parallel in 3.The coordinated P atoms are significantly displaced from the cyclopentadienyl ring planes.From the comparison of these geometrical parameters, it is concluded that the rotation of the two cyclopentadienyl rings is a predominant factor to determine various coordination modes of dppfe rather than the tilt of the two rings and/or the deviation of the P atoms from the ring plane.The 57Fe Moessbauer spectra of this series of compounds show doublets with parameters (IS=0.50-0.52 mm s-1 relative to Fe, QS=2.22-2.35 mm s-1).Although isomer shifts are essentially constant, the quadropole splittings have a tendency to increase with the increase of the rotational angle of the two cyclopentadienyl rings. 1H and 31PNMR spectra are measured for all of these compounds.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.COA of Formula: C34H28FeP2, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 12150-46-8, in my other articles.
Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate