Binding Matter with Antimatter: The Covalent Positron Bond

Autor(es)

Charry, Jorge ^[1] ; Varella, Marcio T. do N. ^[2] ; Reyes, Andres ^[1]

Afiliação do(s) autor(es)

^[1] Univ Nacl Colombia Chem, Av Cra 30 45-03, Bogota 00000 - Colombia

^[2] Univ Sao Paulo, Inst Fis, Rua Matao 1731, BR-05508090 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. 57, n. 29, p. 8859-8864, JUL 16 2018.
• Citações Web of Science: 5

Resumo

We report sufficient theoretical evidence of the energy stability of the e(+)H(2)(2-) molecule, formed by two H- anions and one positron. Analysis of the electronic and positronic densities of the latter compound undoubtedly points out the formation of a positronic covalent bond between the otherwise repelling hydride anions. The lower limit for the bonding energy of the e(+)H(2)(2-) molecule is 74kJmol(-1) (0.77eV), accounting for the zero-point vibrational correction. The formation of a non electronic covalent bond is fundamentally distinct from positron attachment to stable molecules, as the latter process is characterized by a positron affinity, analogous to the electron affinity. (AU)

• Processo FAPESP: 14/10012-9 - Transientes moleculares
• Beneficiário: Márcio Teixeira do Nascimento Varella
• Modalidade de apoio: Auxílio à Pesquisa - Regular