The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
Grove D.m. - One of the best experts on this subject based on the ideXlab platform.
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A Novel Aryllithium : Lithium Bromide Complex Containing an Anionic Pentadentate Organylpolyamine System Enfolding two Lithium Centers
1993Co-Authors: Koten G. Van, Wehman-ooyevaar I.c.m., Kapteijn G.m., Grove D.m., Spek A.l.Abstract:The Aryllithium Compound Li2[C6H3CH2N(Me)CH2CH2NMe22 2,6]Br, which has been characterized by an X-ray crystallographic determination and by NMR spectroscopy, was obtained from the reaction of [C6H3Br(CH2N(Me)CH2CH2NMe2)2-2,6] with 2 equivalents of nBuLi. The lithium Compound has a novel structural feature: a Li2ArBr core in which the bromide is bridge-bonded (LiBrLi 64.8(2)) and Cipso is involved in a three-centre two electron (3c-2e) bond (LiCli 72.2(2)). The coordination sphere of each lithium atom is completed by coordination with the two N-donor atoms of the ortho-CH2N(Me)CH2CH2NMe2 substituents
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Novel Rhodate and Iridate Complexes containing C,N Chelating Arylamine Ligand Systems
1993Co-Authors: Koten G. Van, Wehman-ooyevaar I.c.m., Jastrzebski J.t.b.h., Vedral J.a., Grove D.m.Abstract:The synthesis is described of a series of new iridate and rhodate complexes Li(L-C, N){2}M(cod) (M = Rh, Ir; cod = cycloocta-1,5-diene) containing the ortho-chelating, mono-anionic, arylamine ligands L = C{6}H{4}CH{2}NR{2}-2 (R = Me, Et), C{6}H{3}CH{2}NMe{2}- 2-Me-5, C{6}H{4}CH(Me)NMe{2}-(R)-2 or C{6}H{4}CH{2}NMe(}t{Bu)-2. The synthetic procedure for the -ate complexes from [MCl(cod)] {2} depends on the solubility of the starting Aryllithium Compound in benzene-an indirect effect of the bulky organic group on the N-donor atom. All the -ate complexes are formed diastereoselectively (and in the case of C{6}H{4}CH(Me)NMe{2}-(R)-2, enantioselectively). }1{H and }1{}3{C NMR spectroscopies show the -ate complexes to be monomeric, heterobimetallic species. The }1{}3{C NMR data show clearly that C{i}{p}{s}{o} is bridging between the late transition metal and the lithium centre. Consequently, this C{i}{p}{s}{o} atom is chiral, and its configuration is stabilized by intramolecular coordination of the N-donor atom of the ortho-amine substituent. The -ate complexes are fluxional with differences in fluxionality (which involve N-dissociation/association, pyramidal inversion at N and rotation around the C{b}{e}{n}{z}{y}{l}-N bond) that can be attributed to differences in the bulk of the groups on the nitrogen atom
Koten G. Van - One of the best experts on this subject based on the ideXlab platform.
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A Novel Aryllithium : Lithium Bromide Complex Containing an Anionic Pentadentate Organylpolyamine System Enfolding two Lithium Centers
1993Co-Authors: Koten G. Van, Wehman-ooyevaar I.c.m., Kapteijn G.m., Grove D.m., Spek A.l.Abstract:The Aryllithium Compound Li2[C6H3CH2N(Me)CH2CH2NMe22 2,6]Br, which has been characterized by an X-ray crystallographic determination and by NMR spectroscopy, was obtained from the reaction of [C6H3Br(CH2N(Me)CH2CH2NMe2)2-2,6] with 2 equivalents of nBuLi. The lithium Compound has a novel structural feature: a Li2ArBr core in which the bromide is bridge-bonded (LiBrLi 64.8(2)) and Cipso is involved in a three-centre two electron (3c-2e) bond (LiCli 72.2(2)). The coordination sphere of each lithium atom is completed by coordination with the two N-donor atoms of the ortho-CH2N(Me)CH2CH2NMe2 substituents
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Novel Rhodate and Iridate Complexes containing C,N Chelating Arylamine Ligand Systems
1993Co-Authors: Koten G. Van, Wehman-ooyevaar I.c.m., Jastrzebski J.t.b.h., Vedral J.a., Grove D.m.Abstract:The synthesis is described of a series of new iridate and rhodate complexes Li(L-C, N){2}M(cod) (M = Rh, Ir; cod = cycloocta-1,5-diene) containing the ortho-chelating, mono-anionic, arylamine ligands L = C{6}H{4}CH{2}NR{2}-2 (R = Me, Et), C{6}H{3}CH{2}NMe{2}- 2-Me-5, C{6}H{4}CH(Me)NMe{2}-(R)-2 or C{6}H{4}CH{2}NMe(}t{Bu)-2. The synthetic procedure for the -ate complexes from [MCl(cod)] {2} depends on the solubility of the starting Aryllithium Compound in benzene-an indirect effect of the bulky organic group on the N-donor atom. All the -ate complexes are formed diastereoselectively (and in the case of C{6}H{4}CH(Me)NMe{2}-(R)-2, enantioselectively). }1{H and }1{}3{C NMR spectroscopies show the -ate complexes to be monomeric, heterobimetallic species. The }1{}3{C NMR data show clearly that C{i}{p}{s}{o} is bridging between the late transition metal and the lithium centre. Consequently, this C{i}{p}{s}{o} atom is chiral, and its configuration is stabilized by intramolecular coordination of the N-donor atom of the ortho-amine substituent. The -ate complexes are fluxional with differences in fluxionality (which involve N-dissociation/association, pyramidal inversion at N and rotation around the C{b}{e}{n}{z}{y}{l}-N bond) that can be attributed to differences in the bulk of the groups on the nitrogen atom
Viktoria H. Gessner - One of the best experts on this subject based on the ideXlab platform.
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c7h7lio 6 thf 2 μ diglyme κo κo li2o a μ6 o2 ion encapsulating Aryllithium Compound
Zeitschrift für anorganische und allgemeine Chemie, 2007Co-Authors: Carsten Strohmann, Viktoria H. GessnerAbstract:The oxygen-incorporating Compound [{(C7H7LiO)6(thf)(μ-diglyme-κO,κO′)}]Li2O (1) was obtained by lithiation of 2-bromomethoxybenzene with n-butyllithium in n-pentane, thf and diglyme. 1 ranks among the rare species of μ6-O2– ions encapsulating organolithium Compounds. At the centre of this mixed aggregate is an octahedral Li6O-unit, which is additionally capped by lithium atoms at two facing Li3 triangles.
Wehman-ooyevaar I.c.m. - One of the best experts on this subject based on the ideXlab platform.
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A Novel Aryllithium : Lithium Bromide Complex Containing an Anionic Pentadentate Organylpolyamine System Enfolding two Lithium Centers
1993Co-Authors: Koten G. Van, Wehman-ooyevaar I.c.m., Kapteijn G.m., Grove D.m., Spek A.l.Abstract:The Aryllithium Compound Li2[C6H3CH2N(Me)CH2CH2NMe22 2,6]Br, which has been characterized by an X-ray crystallographic determination and by NMR spectroscopy, was obtained from the reaction of [C6H3Br(CH2N(Me)CH2CH2NMe2)2-2,6] with 2 equivalents of nBuLi. The lithium Compound has a novel structural feature: a Li2ArBr core in which the bromide is bridge-bonded (LiBrLi 64.8(2)) and Cipso is involved in a three-centre two electron (3c-2e) bond (LiCli 72.2(2)). The coordination sphere of each lithium atom is completed by coordination with the two N-donor atoms of the ortho-CH2N(Me)CH2CH2NMe2 substituents
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Novel Rhodate and Iridate Complexes containing C,N Chelating Arylamine Ligand Systems
1993Co-Authors: Koten G. Van, Wehman-ooyevaar I.c.m., Jastrzebski J.t.b.h., Vedral J.a., Grove D.m.Abstract:The synthesis is described of a series of new iridate and rhodate complexes Li(L-C, N){2}M(cod) (M = Rh, Ir; cod = cycloocta-1,5-diene) containing the ortho-chelating, mono-anionic, arylamine ligands L = C{6}H{4}CH{2}NR{2}-2 (R = Me, Et), C{6}H{3}CH{2}NMe{2}- 2-Me-5, C{6}H{4}CH(Me)NMe{2}-(R)-2 or C{6}H{4}CH{2}NMe(}t{Bu)-2. The synthetic procedure for the -ate complexes from [MCl(cod)] {2} depends on the solubility of the starting Aryllithium Compound in benzene-an indirect effect of the bulky organic group on the N-donor atom. All the -ate complexes are formed diastereoselectively (and in the case of C{6}H{4}CH(Me)NMe{2}-(R)-2, enantioselectively). }1{H and }1{}3{C NMR spectroscopies show the -ate complexes to be monomeric, heterobimetallic species. The }1{}3{C NMR data show clearly that C{i}{p}{s}{o} is bridging between the late transition metal and the lithium centre. Consequently, this C{i}{p}{s}{o} atom is chiral, and its configuration is stabilized by intramolecular coordination of the N-donor atom of the ortho-amine substituent. The -ate complexes are fluxional with differences in fluxionality (which involve N-dissociation/association, pyramidal inversion at N and rotation around the C{b}{e}{n}{z}{y}{l}-N bond) that can be attributed to differences in the bulk of the groups on the nitrogen atom
Carsten Strohmann - One of the best experts on this subject based on the ideXlab platform.
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c7h7lio 6 thf 2 μ diglyme κo κo li2o a μ6 o2 ion encapsulating Aryllithium Compound
Zeitschrift für anorganische und allgemeine Chemie, 2007Co-Authors: Carsten Strohmann, Viktoria H. GessnerAbstract:The oxygen-incorporating Compound [{(C7H7LiO)6(thf)(μ-diglyme-κO,κO′)}]Li2O (1) was obtained by lithiation of 2-bromomethoxybenzene with n-butyllithium in n-pentane, thf and diglyme. 1 ranks among the rare species of μ6-O2– ions encapsulating organolithium Compounds. At the centre of this mixed aggregate is an octahedral Li6O-unit, which is additionally capped by lithium atoms at two facing Li3 triangles.
