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This article focuses on the N\u2014H...O hydrogen bonds by considering the structures of (I), (II), (III) and (IV), and reviewing their analogous compounds, including 43 (C)P(O)(N)<jats:sub>2<\/jats:sub>, 102 (C)<jats:sub>2<\/jats:sub>P(O)(N), 31 (C)P(O)(N)(O) and 96 (C)<jats:sub>2<\/jats:sub>P(O)(O) structures, deposited in the Cambridge Structural Database (CSD). For the structures with a (C)P(O)(N)<jats:sub>2<\/jats:sub> segment, only neutral hydrogen bonds were found in the CSD. The other three classes of compounds included both neutral and `charge-assisted' hydrogen bonds, and the (C)<jats:sub>2<\/jats:sub>P(O)(O) structures were particularly noticeable for a high number of cation\u2013anion compounds. The overall tendencies of N...O distances in neutral and cation\u2013anion compounds were compared. The N\u2014H...O hydrogen-bond angles were also analyzed for the four classes of phosphorus compounds.<\/jats:p>","DOI":"10.1107\/s2053229617001516","type":"journal-article","created":{"date-parts":[[2017,2,21]],"date-time":"2017-02-21T16:21:00Z","timestamp":1487694060000},"page":"287-297","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":11,"title":["Extensive analysis of N\u2014H...O hydrogen bonding in four classes of phosphorus compounds: a combined experimental and database study"],"prefix":"10.1107","volume":"73","author":[{"given":"Farahnaz","family":"Hamzehee","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5608-2111","authenticated-orcid":true,"given":"Mehrdad","family":"Pourayoubi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marek","family":"Ne\u010das","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Duane","family":"Choquesillo-Lazarte","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2017,2,21]]},"reference":[{"key":"ky3108_bb1","unstructured":"Agilent (2014). 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