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Genehsiang Lee - One of the best experts on this subject based on the ideXlab platform.

  • trinuclear zirconium polyhydride cp zr bh3ch3 μ h 2 cp zr bh3ch3 μ h cp zr bh3ch3 μ κ2c h κ1c κ2c h chbh3 and its derivatives compounds containing a pentacoordinated carbon atom
    Organometallics, 2015
    Co-Authors: Fuchen Liu, Hengguang Chen, Genehsiang Lee
    Abstract:

    The reaction of Cp*Zr(BH3CH3)3 with an excess amount of trimethylamine in a toluene solution yields the hypercarbon-containing complex ({Cp*Zr(BH3CH3)}(μ-H)2{Cp*Zr(BH3CH3)}(μ-H){Cp*Zr(BH3CH3)})(μ-κ2C,H:κ1C:κ2C,H-CHBH3), 1. To our knowledge, this is the first example in which a hypercoordinated carbon-containing complex was prepared from the reaction of a hydroborate complex with a Lewis base. The reaction of 1, NaH, and [N(CH3)4]Cl produces the anionic Product [N(CH3)4][({Cp*ZrCl}{(μ-H)2{Cp*Zr(BH3CH3)}}2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)], 2, whereas the reaction of 1 with B(C6F5)3 produces the hydride abstraction Cationic Product [({Cp*Zr(BH3CH3)}{(μ-H){Cp*Zr(BH3CH3)}}2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)][HB(C6F5)3], 3. The further reaction of 3 with [N(CH3)4]Cl and NaOH produces the neutral complex ({Cp*Zr(BH3CH3)}((μ-H){Cp*Zr(BH3CH3)})2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)(μ3-X) (X = Cl (4), OH (5)). Single-crystal X-ray structures of 1, 2, 3, 4, and 5 reveal a pentacoordinated carbon atom, which coordinates to a boron atom, a hy...

Fuchen Liu - One of the best experts on this subject based on the ideXlab platform.

  • trinuclear zirconium polyhydride cp zr bh3ch3 μ h 2 cp zr bh3ch3 μ h cp zr bh3ch3 μ κ2c h κ1c κ2c h chbh3 and its derivatives compounds containing a pentacoordinated carbon atom
    Organometallics, 2015
    Co-Authors: Fuchen Liu, Hengguang Chen, Genehsiang Lee
    Abstract:

    The reaction of Cp*Zr(BH3CH3)3 with an excess amount of trimethylamine in a toluene solution yields the hypercarbon-containing complex ({Cp*Zr(BH3CH3)}(μ-H)2{Cp*Zr(BH3CH3)}(μ-H){Cp*Zr(BH3CH3)})(μ-κ2C,H:κ1C:κ2C,H-CHBH3), 1. To our knowledge, this is the first example in which a hypercoordinated carbon-containing complex was prepared from the reaction of a hydroborate complex with a Lewis base. The reaction of 1, NaH, and [N(CH3)4]Cl produces the anionic Product [N(CH3)4][({Cp*ZrCl}{(μ-H)2{Cp*Zr(BH3CH3)}}2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)], 2, whereas the reaction of 1 with B(C6F5)3 produces the hydride abstraction Cationic Product [({Cp*Zr(BH3CH3)}{(μ-H){Cp*Zr(BH3CH3)}}2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)][HB(C6F5)3], 3. The further reaction of 3 with [N(CH3)4]Cl and NaOH produces the neutral complex ({Cp*Zr(BH3CH3)}((μ-H){Cp*Zr(BH3CH3)})2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)(μ3-X) (X = Cl (4), OH (5)). Single-crystal X-ray structures of 1, 2, 3, 4, and 5 reveal a pentacoordinated carbon atom, which coordinates to a boron atom, a hy...

Hengguang Chen - One of the best experts on this subject based on the ideXlab platform.

  • trinuclear zirconium polyhydride cp zr bh3ch3 μ h 2 cp zr bh3ch3 μ h cp zr bh3ch3 μ κ2c h κ1c κ2c h chbh3 and its derivatives compounds containing a pentacoordinated carbon atom
    Organometallics, 2015
    Co-Authors: Fuchen Liu, Hengguang Chen, Genehsiang Lee
    Abstract:

    The reaction of Cp*Zr(BH3CH3)3 with an excess amount of trimethylamine in a toluene solution yields the hypercarbon-containing complex ({Cp*Zr(BH3CH3)}(μ-H)2{Cp*Zr(BH3CH3)}(μ-H){Cp*Zr(BH3CH3)})(μ-κ2C,H:κ1C:κ2C,H-CHBH3), 1. To our knowledge, this is the first example in which a hypercoordinated carbon-containing complex was prepared from the reaction of a hydroborate complex with a Lewis base. The reaction of 1, NaH, and [N(CH3)4]Cl produces the anionic Product [N(CH3)4][({Cp*ZrCl}{(μ-H)2{Cp*Zr(BH3CH3)}}2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)], 2, whereas the reaction of 1 with B(C6F5)3 produces the hydride abstraction Cationic Product [({Cp*Zr(BH3CH3)}{(μ-H){Cp*Zr(BH3CH3)}}2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)][HB(C6F5)3], 3. The further reaction of 3 with [N(CH3)4]Cl and NaOH produces the neutral complex ({Cp*Zr(BH3CH3)}((μ-H){Cp*Zr(BH3CH3)})2)(μ-κ2C,H:κ1C:κ2C,H-CHBH3)(μ3-X) (X = Cl (4), OH (5)). Single-crystal X-ray structures of 1, 2, 3, 4, and 5 reveal a pentacoordinated carbon atom, which coordinates to a boron atom, a hy...

Meesschaert Boudewijn - One of the best experts on this subject based on the ideXlab platform.

  • Fractionating various nutrient ions for resource recovery from swine wastewater using simultaneous anionic and Cationic selective-electrodialysis
    'Elsevier BV', 2019
    Co-Authors: Ye Zhi-long, Ghyselbrecht Karel, Monballiu Annick, Pinoy Luc, Meesschaert Boudewijn
    Abstract:

    Different from current nutrient recovery technologies of recovering one or two nutrient components (PO43- or NH4+) from wastewater, this study aimed to fractionate various nutrient anions and cations simultaneously, including PO43-, SO42-, NH4+, K+, Mg2+ and Ca2+, into several streams. The recovered streams could be further paired together to produce high-value Products. A novel electrodialysis process was developed by integrating monovalent selective anion and cation exchange membranes into an electrodialysis stack. Results revealed that nutrient recovery was achieved effectively by fractionating PO43- and SO42- into the anionic Product stream, whereas bivalent cations (Mg2+ and Ca2+) were extracted in the Cationic Product stream and the monovalent cations (K+ and NH4+) were concentrated in the brine stream. For the permeation capabilities of anions, SO42- and Cl- possessed the higher preference, whereas PO43- permeated the membrane more difficult. As to the cations, the permeation sequence was: NH4+≈K+ >Ca2+>Mg2+≈Na+. Enhancing voltage values not only promoted ion migration rates, but also led to the increase of energy consumption. Although elevating initial phosphate concentration in the anionic Product streams from 60 mg/L to 470 mg/L did not influence phosphate fractionation significantly, the current efficiency decreased from 3.55% to 0.65% and a remarkable increased of energy consumption from 29.42 kWh/kg NaH2PO4 to 160.13 kWh/kg NaH2PO4 was observed. Further experiments were conducted for phosphorus recovery by pairing two recovered Product streams, which revealed that phosphate precipitation could be achieved by using inherent Ca2+ and Mg2+ in the wastewater without dosing external cation sources.status: publishe

Ye Zhi-long - One of the best experts on this subject based on the ideXlab platform.

  • Fractionating various nutrient ions for resource recovery from swine wastewater using simultaneous anionic and Cationic selective-electrodialysis
    'Elsevier BV', 2019
    Co-Authors: Ye Zhi-long, Ghyselbrecht Karel, Monballiu Annick, Pinoy Luc, Meesschaert Boudewijn
    Abstract:

    Different from current nutrient recovery technologies of recovering one or two nutrient components (PO43- or NH4+) from wastewater, this study aimed to fractionate various nutrient anions and cations simultaneously, including PO43-, SO42-, NH4+, K+, Mg2+ and Ca2+, into several streams. The recovered streams could be further paired together to produce high-value Products. A novel electrodialysis process was developed by integrating monovalent selective anion and cation exchange membranes into an electrodialysis stack. Results revealed that nutrient recovery was achieved effectively by fractionating PO43- and SO42- into the anionic Product stream, whereas bivalent cations (Mg2+ and Ca2+) were extracted in the Cationic Product stream and the monovalent cations (K+ and NH4+) were concentrated in the brine stream. For the permeation capabilities of anions, SO42- and Cl- possessed the higher preference, whereas PO43- permeated the membrane more difficult. As to the cations, the permeation sequence was: NH4+≈K+ >Ca2+>Mg2+≈Na+. Enhancing voltage values not only promoted ion migration rates, but also led to the increase of energy consumption. Although elevating initial phosphate concentration in the anionic Product streams from 60 mg/L to 470 mg/L did not influence phosphate fractionation significantly, the current efficiency decreased from 3.55% to 0.65% and a remarkable increased of energy consumption from 29.42 kWh/kg NaH2PO4 to 160.13 kWh/kg NaH2PO4 was observed. Further experiments were conducted for phosphorus recovery by pairing two recovered Product streams, which revealed that phosphate precipitation could be achieved by using inherent Ca2+ and Mg2+ in the wastewater without dosing external cation sources.status: publishe