
Acta Crystallographica Section C: Structural Chemistry p. 769 - 781 (2018)
Update date:2022-08-15
Topics:
Ellis, John E.
Minyaev, Mikhail E.
Nifant’Ev, Ilya E.
Churakov, Andrei V.
The structural study of Sc complexes containing dianions of anthracene and tetraphenylethylene should shed some light on the nature of rare-earth metal-carbon bonding. The crystal structures of (18-crown-6)bis(tetrahydrofuran-κO)sodium bis(η6-1,1,2,2-tetraphenylethenediyl)scandium(III) tetrahydrofuran disolvate, [Na(C4H8O)2(C12H24O6)][Sc(C26H20)2]·2C4H8O or [Na(18-crown-6)(THF)2][Sc(η6-C2Ph4)2]·2(THF), (1b), (η5-1,3-diphenylcyclopentadienyl)(tetrahydrofuran-κO)(η6-1,1,2,2-tetraphenylethenediyl)scandium(III) toluene hemisolvate, [Sc(C17H13)(C26H20)(C4H8O)]·0.5C7H8 or [(η5-1,3-Ph2C5H3)Sc(η6-C2Ph4)(THF)]·0.5(toluene), (5b), poly[[(μ2-η3:η3-anthracenediyl)bis(η6-anthracenediyl)bis(η5-1,3-diphenylcyclopentadienyl)tetrakis(tetrahydrofuran)dipotassiumdiscandium(III)] tetrahydrofuran monosolvate], {[K2Sc2(C14H10)3(C17H13)2(C4H8O)4]·C4H8O}n or [K(THF)2]2[(1,3-Ph2C5H3)2Sc2(C14H10)3]·THF, (6), and 1,4-diphenylcyclopenta-1,3-diene, C17H14, (3a), have been established. The [Sc(η6-C2Ph4)2]-complex anion in (1b) contains the tetraphenylethylene dianion in a symmetrical bis-η3-allyl coordination mode. The complex homoleptic [Sc(η6-C2Ph4)2]-anion retains its structure in THF solution, displaying hindered rotation of the coordinated phenyl rings. The1D1H and13C{1H}, and 2D COSY1H-1H and13C-1H NMR data are presented for M[Sc(Ph4C2)2]·xTHF [M = Na and x = 4 for (1a); M = K and x = 3.5 for (2a)] in THF-d8 media. Complex (5b) exhibits an unsymmetrical bis-η3-allyl coordination mode of the dianion, but this changes to a η4 coordination mode for (1,3-Ph2C5H3)Sc(Ph4C2)(THF)2, (5a), in THF-d8 solution. A 45Sc NMR study of (2a) and UV-Vis studies of (1a), (2a) and (5a) indicate a significant covalent contribution to the Sc-Ph4C2 bond character. The unique Sc ate complex, (6), contains three anthracenide dianions demonstrating both a η6-coordination mode for two bent ligands and a μ2-η3:η3-bridging mode of a flat ligand. Each [(1,3-Ph2C5H3)2Sc2(C14H10)3]2-dianionic unit is connected to four neighbouring units via short contacts with [K(THF)2]+ cations, forming a two-dimensional coordination polymer framework parallel to (001).
chengdu firsterchem Pharmaceutical Co., Ltd.
Contact:028-66825849
Address:chengdu
Contact:+86-535-8888888
Address:No.161 Haishi Rd.
Yixing Bluwat Chemicals Co., Ltd.
Contact:+86 510 87821568
Address:Yongan Road, Yixing Chemical Industrial Park, Yixing, Jiangsu, China
Nanjing distinctions Medical Technology Co., Ltd.(expird)
Contact:+86-15996203785 13914714059
Address:nanjing,jiangsu , China
Shanghai Sinofluoro Scientific Co., Ltd
Contact:+86-21-64279360
Address:Room 1006,Building 3,#58 East Xinjian Road, Shanghai ,201100,China,
Doi:10.1039/d1ra03608d
(2021)Doi:10.1080/07328300701540258
(2007)Doi:10.1134/S1070363214110206
()Doi:10.1142/S108842461850030X
(2018)Doi:10.1021/acs.joc.5b01030
(2015)Doi:10.1021/acs.organomet.0c00675
(2021)