Dinitrogen complexation and reduction at low-valent calcium

B. Rösch; T. X. Gentner; J. Langer; C. Färber; J. Eyselein; L. Zhao; C. Ding; G. Frenking; S. Harder

doi:10.1126/science.abf2374

Dinitrogen complexation and reduction at low-valent calcium

B. Rösch, T. X. Gentner, J. Langer, C. Färber, J. Eyselein, L. Zhao, C. Ding, G. Frenking, S. Harder

School of Chemistry and Moleculai Engineering

Research output: Contribution to journal › Article › peer-review

181 Scopus citations

Abstract

Here we report that attempted preparation of low-valent Ca^I complexes in the form of LCa-CaL (where L is a bulky b-diketiminate ligand) under dinitrogen (N₂) atmosphere led to isolation of LCa(N₂)CaL, which was characterized crystallographically. The N₂²- anion in this complex reacted in most cases as a very potent two-electron donor. Therefore, LCa(N₂)CaL acts as a synthon for the low-valent Ca^I complex LCa-CaL, which was the target of our studies. The N₂²- anion could also be protonated to diazene (N₂H₂) that disproportionated to hydrazine and N₂. The role of Ca d orbitals for N₂ activation is discussed.

Original language	English
Pages (from-to)	1125-1128
Number of pages	4
Journal	Science
Volume	371
Issue number	6534
DOIs	https://doi.org/10.1126/science.abf2374
State	Published - 12 Mar 2021

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title = "Dinitrogen complexation and reduction at low-valent calcium",

abstract = "Here we report that attempted preparation of low-valent CaI complexes in the form of LCa-CaL (where L is a bulky b-diketiminate ligand) under dinitrogen (N2) atmosphere led to isolation of LCa(N2)CaL, which was characterized crystallographically. The N22- anion in this complex reacted in most cases as a very potent two-electron donor. Therefore, LCa(N2)CaL acts as a synthon for the low-valent CaI complex LCa-CaL, which was the target of our studies. The N22- anion could also be protonated to diazene (N2H2) that disproportionated to hydrazine and N2. The role of Ca d orbitals for N2 activation is discussed.",

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doi = "10.1126/science.abf2374",

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TY - JOUR

T1 - Dinitrogen complexation and reduction at low-valent calcium

AU - Rösch, B.

AU - Gentner, T. X.

AU - Langer, J.

AU - Färber, C.

AU - Eyselein, J.

AU - Zhao, L.

AU - Ding, C.

AU - Frenking, G.

AU - Harder, S.

PY - 2021/3/12

Y1 - 2021/3/12

N2 - Here we report that attempted preparation of low-valent CaI complexes in the form of LCa-CaL (where L is a bulky b-diketiminate ligand) under dinitrogen (N2) atmosphere led to isolation of LCa(N2)CaL, which was characterized crystallographically. The N22- anion in this complex reacted in most cases as a very potent two-electron donor. Therefore, LCa(N2)CaL acts as a synthon for the low-valent CaI complex LCa-CaL, which was the target of our studies. The N22- anion could also be protonated to diazene (N2H2) that disproportionated to hydrazine and N2. The role of Ca d orbitals for N2 activation is discussed.

AB - Here we report that attempted preparation of low-valent CaI complexes in the form of LCa-CaL (where L is a bulky b-diketiminate ligand) under dinitrogen (N2) atmosphere led to isolation of LCa(N2)CaL, which was characterized crystallographically. The N22- anion in this complex reacted in most cases as a very potent two-electron donor. Therefore, LCa(N2)CaL acts as a synthon for the low-valent CaI complex LCa-CaL, which was the target of our studies. The N22- anion could also be protonated to diazene (N2H2) that disproportionated to hydrazine and N2. The role of Ca d orbitals for N2 activation is discussed.

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U2 - 10.1126/science.abf2374

DO - 10.1126/science.abf2374

M3 - 文章

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SN - 0036-8075

VL - 371

SP - 1125

EP - 1128

JO - Science

JF - Science

IS - 6534

ER -

Dinitrogen complexation and reduction at low-valent calcium

Abstract

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