The nature of bonding and stability of beryllium carbonyl (CO)2Be-Be(CO)2: a molecule with a beryllium-beryllium double bond

Sunil, K.

doi:10.1021/ja00036a061

“…The electronic structure of both the bis-and tetrakis-NHC adducts shows a clear p bond between the Be atoms ( Figure 10), as was predicted for the fleeting CO species. [59] If a successful synthesis of these compounds could be undertaken they would represent the first homoatomic p bond for the s-block elements. Reasonable precursors for these compounds (Be II halides ligated by NHCs) are known.…”

Section: Recent Synthetic Accomplishmentsmentioning

confidence: 99%

Recent Advances in the Field of Main‐Group Mono‐ and Diatomic “Allotropes” Stabilised by Neutral Ligands

Wilson¹,

Dutton²

2013

Chemistry A European J

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The study of ligand stabilised mono- and diatomic zero oxidation state complexes is a young and fascinating topic. This area merges the fields of low-oxidation-state main-group chemistry, homoatomic multiple bonding and fundamental coordination chemistry. As with a great deal of recent coordination chemistry within the d-block, carbene ligands are clearly the star of the show, highlighting their importance within the p-block as well. This Minireview focuses on the significant developments of the past two years.

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“…Beryllium, Be,a ppears to be the s-block element most likely involved in p bonding.Sunil first described aBe-Be p bond between two sp 2 hybridized Be atoms in (CO) 2 Be À Be(CO) 2 ,in1 992, [1] an analysis that was initially contested. [2] However,several studies have since shown or suggested that Be actually can form p bonds,e ither to other Bes, or to different elements.B eryllium-carbon p bonding was found for Be complexes with cyclic carbene donors, [3] as well as ab eryllated carbodiphosphonane, [4] twoe xamples of molecules that were synthesized and characterized.…”

Section: Introductionmentioning

confidence: 99%

Be–Be π‐Bonding and Predicted Superconductivity in MBe₂ (M=Zr, Hf)

Goesten

¹

2021

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Beryllium, an s‐block element, forms an aromatic network of delocalized Be–Be π bonds in alloys ZrBe2 and HfBe2. This gives rise to stacked [Be2]4− layers with tetravalent cations in between. The [Be2]4− sublattice is isoelectronic and isostructural to graphite, as well as the [B]−2 sublattice in MgB2, and it bears identical manifestations of π bonding in its electronic band structure. These come in the form of degeneracies at K and H in the Brillouin zone, separated in energy as the result of interlayer orbital interactions. Zr and Hf use their valence d orbitals to form bonds with the layers, leading to nearly identical band structures. Like MgB2, ZrBe2 and HfBe2 are computed to be phonon‐mediated superconductors at ambient pressures, with respective critical temperatures of 11.4 K and 8.8 K. The coupling strength between phonons and free electrons is very similar, so that the difference in critical temperatures is controlled by the mass of constituent interlayer ions.

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“…Beryllium, Be, appears to be the s‐block element most likely involved in π bonding. Sunil first described a Be–Be π bond between two sp 2 hybridized Be atoms in (CO) 2 Be−Be(CO) 2 , in 1992, [1] an analysis that was initially contested [2] . However, several studies have since shown or suggested that Be actually can form π bonds, either to other Be's, or to different elements.…”

Section: Introductionmentioning

confidence: 99%

Be–Be π‐Bonding and Predicted Superconductivity in MBe₂ (M=Zr, Hf)

Goesten

¹

2021

Angewandte Chemie

1

0

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Beryllium, an s‐block element, forms an aromatic network of delocalized Be–Be π bonds in alloys ZrBe2 and HfBe2. This gives rise to stacked [Be2]4− layers with tetravalent cations in between. The [Be2]4− sublattice is isoelectronic and isostructural to graphite, as well as the [B]−2 sublattice in MgB2, and it bears identical manifestations of π bonding in its electronic band structure. These come in the form of degeneracies at K and H in the Brillouin zone, separated in energy as the result of interlayer orbital interactions. Zr and Hf use their valence d orbitals to form bonds with the layers, leading to nearly identical band structures. Like MgB2, ZrBe2 and HfBe2 are computed to be phonon‐mediated superconductors at ambient pressures, with respective critical temperatures of 11.4 K and 8.8 K. The coupling strength between phonons and free electrons is very similar, so that the difference in critical temperatures is controlled by the mass of constituent interlayer ions.

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The nature of bonding and stability of beryllium carbonyl (CO)2Be-Be(CO)2: a molecule with a beryllium-beryllium double bond

Cited by 44 publications

References 1 publication

Recent Advances in the Field of Main‐Group Mono‐ and Diatomic “Allotropes” Stabilised by Neutral Ligands

Recent Advances in the Field of Main‐Group Mono‐ and Diatomic “Allotropes” Stabilised by Neutral Ligands

Be–Be π‐Bonding and Predicted Superconductivity in MBe₂ (M=Zr, Hf)

Be–Be π‐Bonding and Predicted Superconductivity in MBe₂ (M=Zr, Hf)

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The nature of bonding and stability of beryllium carbonyl (CO)2Be-Be(CO)2: a molecule with a beryllium-beryllium double bond

Cited by 44 publications

References 1 publication

Recent Advances in the Field of Main‐Group Mono‐ and Diatomic “Allotropes” Stabilised by Neutral Ligands

Recent Advances in the Field of Main‐Group Mono‐ and Diatomic “Allotropes” Stabilised by Neutral Ligands

Be–Be π‐Bonding and Predicted Superconductivity in MBe2 (M=Zr, Hf)

Be–Be π‐Bonding and Predicted Superconductivity in MBe2 (M=Zr, Hf)

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Be–Be π‐Bonding and Predicted Superconductivity in MBe₂ (M=Zr, Hf)

Be–Be π‐Bonding and Predicted Superconductivity in MBe₂ (M=Zr, Hf)