Variation of Nucleophilicity NHnA of Atoms A in Hydrides HnA with the Group and Row of A in the Periodic Table
Nucleophilicities N-HnA of hydrides of atoms A acting as hydrogen-bond acceptors in complexes H(n)AHX are reported. The H(n)A initially chosen are HB, H2C, H3N, H2O, and HF, that is from groups 13, 14, 15, 16, and 17, respectively, of row 1 of the Periodic Table. The Lewis acids HX involved are HF,...
| Authors: | , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2025 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/391347 |
| Online Access: | http://hdl.handle.net/10261/391347 |
| Access Level: | Open access |
| Keyword: | Dissociation energies of hydrogen-bonded complexesof Lewis bases HnA Dependence of nucleophilicity of Group and Row in Periodic Table nucleophilicities of hydrides of Group 13-17 atoms in Periodic Table |
| Summary: | Nucleophilicities N-HnA of hydrides of atoms A acting as hydrogen-bond acceptors in complexes H(n)AHX are reported. The H(n)A initially chosen are HB, H2C, H3N, H2O, and HF, that is from groups 13, 14, 15, 16, and 17, respectively, of row 1 of the Periodic Table. The Lewis acids HX involved are HF, HCl, HBr, HI, HCCH, and HCP. Nucleophilicities are determined from dissociation energies D-e for the process H(n)AHX = H(n)A + HX by using D-e = cN(HnA).E-HX, where E-HX are electrophilicities of the Lewis acids HX. This procedure is also followed for hydrides H(n)A in which the atoms A are from the same groups, but from rows 2, 3, and 4 of the Periodic Table. The order of N-HnA values found is row 1 > row 2 approximate to row 3 approximate to row 4 in each of groups 13, 15, 15, 16, and 17, with a large decrease from row 1 to row 2 but with small decreases from rows 2 to 3 to 4. The series RgHX is similarly investigated to give the order of nucleophilicities Rg = Xe > Kr > Ar. > Ne, which is reversed from that in the hydrides of groups 13 to 17. |
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