Sidgwick, Nevil

Selenium, bis(diethyldithiocarbamato)-stereochemistry, 60 Selenium, bis(dithiofurancarbamato)-stereochemistry, 60 Selenium(II) complexes bis(dithiochelate), 60 Selenocyanate complexes linkage isomers, 186 Selenonium ions, trifluoro-stereochemistry, 37 Self-exchange reactions, 333 electron transfer rate constants, 347-353, 366 rate constants calculation, 348 rate constants, 362 Semicarbazide, 1,4-diphenylthio-ruthenium determination, 546 Semi-glycinecresol red metallochromic indicator, 557 Semi-xylenol orange metallochromic indicator, 557 Seven-coordinate compounds stereochemistry, 69-83 Sidgwick, Nevil Vincent, 16 Silicon, tris(acetylacetone)-configuration, 195... 

Sidgwick, Nevil Vincent (1873-1952) British chemist. The first notable contribution by Sidgwick to chemistry was his book The Organic Chemistry of Nitrogen (1910). He subsequently became interested in the electronic structure of atoms, including work on coordination compounds and the hydrogen bond. He summarized his research in an influential book The Electronic Theory of Valency (1927). He spent the rest of his career trying to understand compounds in terms of valence theory. This culminated in his monumental two-volume book The Chemical Elements and their Compounds (1950). 

The VSEPR model was first explored by the British chemists Nevil Sidgwick and Herbert Powell and has been developed by the Canadian chemist Ronald Gillespie. 

Letter from Jocelyn Thorpe to Nevil Sidwick, dated 15 March 1928, Sidgwick Papers, Folder 66,... 

Letter from Fritz London to Nevil Sidgwick, dated Oxford, 10 May 1934, Sidgwick Papers, L.Coll., Oxford. 

Quoted from "Professor N. V. Sidgwick," 284286, in The Oxford Magazine, Thursday, May 1, 1952, 286 Nevil V. Sidgwick Papers, L.Coll.Oxford. 

Andre Job, in discussion following Nevil Sidgwick s paper on variable valence, Institut International de Chimie Solvay, Rapports et discussions sur des questions d actualite. Troisieme conseil de chimie. 12 au 18 avril 1928 (Paris, 1928) hereafter Solvay I IT 412. 

The first attempts to interpret Werner s views on an electronic basis were made in 1923 by Nevil Vincent Sidgwick (1873—1952) and Thomas Martin Lowry (1874—1936).103 Sidgwick s initial concern was to explain Werner s coordination number in terms of the sizes of the sub-groups of electrons in the Bohr atom.104 He soon developed the attempt to systematize coordination numbers into his concept of the effective atomic number (EAN).105 He considered ligands to be Lewis bases which donated electrons (usually one pair per ligand) to the metal ion, which thus behaves as a Lewis acid. Ions tend to add electrons by this process until the EAN (the sum of the electrons on the metal ion plus the electrons donated by the ligand) of the next noble gas is achieved. Today the EAN rule is of little theoretical importance. Although a number of elements obey it, there are many important stable exceptions. Nevertheless, it is extremely useful as a predictive rule in one area of coordination chemistry, that of metal carbonyls and nitrosyls. 

M. Laing, Nevil Vincent Sidgwick, 1873-1952 one of the unsung truly greats , J. Chem. Educ., 1994, 71, 47-473. 

SP - Nevil V. Sidgwick Papers, Lincoln College, Oxford University. 

Tizard, H. T. (1954). Nevil Vincent Sidgwick, 1873—1952. Obituary Notices of Fellows of the Royal Society 9(1) 236-258. 

In 1923, Nevil Vincent Sidgwick (1873-1952) and Thomas Martin Dowry (1874-1936) made the first attempts to interpret Werner s views on an electronic basis. Sidgwick tried to... 

Nevil Vincent Sidgwick and H. M. Powell Nonbonding pairs of electrons and stereochemistry... 

In 1937 English chemist Nevil V. Sidgwick suggested a rule (the octet rule for first-row p-block elements) for complex formation tmder which a metal can acquire ligands until the total number of electrons around it is equal to the number surrounding the next noble gas. This rule was later expanded as the eighteen-electron rule under which a d-block transition metal atom has eighteen electrons in its nine valence orbitals [five n d one (n -I-... 

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