Secondary bonding between chalcogens or pnicogens and halogens

Angewandte Chemie - International Edition

Volumn 37, Issue 13-14, 1998, Pages 1887-1890

  Landrum, Gregory A ^a,b   Hoffmann, Roald ^a  

^a Department of Obstetrics Gynecology   (United States)

^b RWTH AACHEN UNIVERSITY   (Germany)

Author keywords

Acceptor systems; Donor; Halogens; Hypervalent compounds; Intermolecular interactions; Secondary bonding

Indexed keywords

EID: 0032479796     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-3773(19980803)37:13/14<1887::AID-ANIE1887>3.0.CO;2-0     Document Type: Article

References (29)

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19. This narrowing is not solely caused by the fact that bond lengths tend to increase upon moving down in the periodic table. The search criteria used (with a maximum b2 length of 4.5 Å) allow for asymmetry parameters as large as 0.6 when b1 = 2.8 Å. These large asymmetries are just not observed in the Sb-I data set, and are uncommon in that for Sb-Br.
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24. Recognizing this fact, we will only present bond lengths with three significant figures, despite the occasionally much smaller (and perhaps overly optimistic) standard deviations reported by crystallographers.
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29. [4] while electron-rich three-center and donor-acceptor bonding have been treated as distinct approaches to understanding electronic structure, they are easily brought into correspondence. The equivalence of these two approaches may be useful in rationalizing old and devising new chemistry.