Preface -- Acknowledgements -- Contents -- INTRODUCTION -- 1.1 General Considerations -- 1.2 Binary Species -- 1.3 Cyclic Chalcogen Imides -- 1.4 Organic Derivatives -- 1.5 Unsaturated Sulfur-Nitrogen Ring Systems -- 1.6 Intramolecular phi*-phi* Interactions -- 1.7 Intermolecular phi*-phi* Interactions -- 1.8 Chalcogen-Nitrogen Chains and Polymers -- 1.9 Chalcogen-Nitrogen Compounds with the Chalcogen in Higher Oxidation States -- FORMATION OF CHALCOGEN-NITROGEN BONDS -- 2.1 From Ammonia and Ammonium Salts -- 2.2 From Amines and Amido-Lithium or Sodium Reagents -- 2.3 From Azides -- 2.4 From Silicon-Nitrogen or Tin-Nitrogen Reagents -- 2.4 From Silicon-Nitrogen or Tin-Nitrogen Reagents -- Applications of Physical Methods -- 3.1 Diffraction Techniques -- 3.2 14N and 15N NMR Spectroscopy -- 3.3 33S, 77Se and 125Te NMR Spectroscopy -- 3.4 EPR Spectroscopy -- 3.5 Electrochemical Studies -- 3.6 Photoelectron Spectroscopy -- 3.7 UV-Visible and MCD Spectroscopy -- 3.8 Infrared and Raman Spectroscopy -- 3.9 Mass Spectrometry -- Electronic Structures and Reactivity Patterns -- 4.1 Introduction -- 4.2 Bonding in Sulfur-Nitrogen Compounds: Comparison with Organic Systems -- 4.3 Bonding in the Polymer (SN)X and in Sulfur-Nitrogen Chains -- 4.4 Aromaticity in Planar Sulfur-Nitrogen Rings -- 4.5 Bonding in Heterocyclothiazenes: The Isolobal Analogy -- 4.6 Weak Intramolecular Chalcogen-Chalcogen Interactions -- 4.7 Intermolecular Association: Radical Dimerization -- 4.8 Reactivity Patterns: The Role of Frontier Orbital Theory -- 4.8.1 Cycloaddition Reactions -- 4.8.2 Polar and Radical Oxidations -- 4.8.3 Ring Contraction: 1,3-Nitrogen Shifts -- 4.8.4 Fluxional Processes -- Binary Systems -- 5.1 Introduction -- 5.2 Neutral Molecules -- 5.2.1 Thiazyl and selenazyl monomer, NS and NSe1,2 -- 5.2.2 Dinitrogen sulfide, N2S.

5.2.3 Nitrogen disulfide and diselenide, NS2 and NSe2 -- 5.2.4 Disulfur and diselenium dinitride, S2N2 and Se2N2 -- 5.2.5 Tetrasulfur dinitride, S4N2 -- 5.2.6 Tetrasulfur and tetraselenium tetranitride, S4N4 and Se4N4 -- 5.2.7 Pentasulfur hexanitride, S5N6 -- 5.2.8 Tellurium nitrides -- 5.2.9 Tellurium azides -- 5.3 Cations -- 5.3.1 The thiazyl cation, [SN]+ -- 5.3.2 The dithianitronium cation, [S2N]+ -- 5.3.3 The dithiatriazyl cation, [S2N3]+ -- 5.3.4 The trithia and triselena-diazyl cations [E3N2]+ , [E6N4]2+ and [E3N2]2+ (E = S, Se) -- 5.3.5 The cyclotrithiazyl cation, [S3N3]+ -- 5.3.6 The thiotrithiazyl cation, [S4N3]+ -- 5.3.7 The cyclotetrathiazyl dication, [S4N4]2+ -- 5.3.8 The tetrasulfur pentanitride cation, [S4N5]+ -- 5.3.9 The cyclopentathiazyl cation, [S5N5]+ -- 5.4 Anions -- 5.4.1 The sulfur diimide dianion, [SN2]2- -- 5.4.2 The [SSNS]- anion -- 5.4.3 The [SSNSS]- anion -- 5.4.4 Sulfur--nitrogen anions in sulfur--liquid ammonia solutions -- 5.4.5 The [S2N2H]- anion -- 5.4.6 The trisulfur trinitride anion, [S3N3]- -- 5.4.7 The tetrasulfur pentanitride anion, [S4N5]- -- Cyclic Chalcogen Imides -- 6.1 Introduction -- 6.2 Cyclic Sulfur Imides -- 6.2.1 Eight-membered rings -- 6.2.2 Six-, seven-, nine- and ten-membered rings -- 6.3 Cyclic Selenium and Tellurium Imides -- Metal Complexes -- 7.1 Introduction -- 7.2 Thionitrosyl and Selenonitrosyl Complexes -- 7.3 Cyclometallathiazenes -- 7.3.1 Introduction -- 7.3.2 Complexes of the [E2N2H]- and [E2N2]2- anions (E = S, Se) -- 7.3.3 Complexes of the [E3N]- anion (E = S, Se) -- 7.3.4 Complexes of the [S2N3]3- anion -- 7.3.5 Complexes of the [S3N4]2-, [S4N3]- and [S4N4]2- anions -- 7.4 Complexes of SNH and the [SN]- Anion -- 7.5 Complexes of Thiazyl Halides NSX (X = F, Cl, Br), NSF3 and the [NSF2]- Anion -- 7.6 Complexes of the [NSO]-, [NSNR]- and [NSN]2-Anions -- Chalcogen-Nitrogen Halides.

8.1 Introduction -- 8.2 Thiazyl Halides NSX (X = F, Cl, Br) and the [NSX2]- Anions (X = F, Cl) -- 8.3 Thiazyl Trifluoride NSF3 and Haloiminosulfur Difluorides XNSF2 (X = F, Cl) -- 8.4 Acyclic Chalcogen-Nitrogen-Halogen Cations [N(ECl)2]+ (E = S, Se) and [N(SeCl2)2]+ -- 8.5 Tellurium-Nitrogen-Chlorides [Te4N2Cl8]2+ and Te11N6Cl26 -- 8.6 Thiodithiazyl and Selenadiselenazyl Dichloride [E3N2Cl]Cl (E = S, Se) -- 8.7 Cyclotrithiazyl Halides (NSX)3 (X = Cl, F) -- 8.8 Dihalocyclotetrathiazenes S4N4X2 (X = Cl, F) and Cyclotetrathiazyl Fluoride (NSF)4 -- 8.9 Sulfanuric Halides [NS(O)X]3 (X = Cl, F) -- 8.10 Chalcogen-Nitrogen Halides Containing Two Chalcogens -- 8.11 Chalcogen-Nitrogen Halides Containing Three-Coordinate Nitrogen -- Chalcogen-Nitrogen Oxides -- 9.1 Introduction -- 9.2 The Thionyl Imide Anion, [NSO]- -- 9.3 The Thionitrite and Perthionitrite Anions, [SNO]- and [SSNO]- -- 9.4 The [SOxN3]- (x = 2, 3) Anions -- 9.5 Bis(sulfinylamino)chalcogenanes E(NSO)2 (E = S, Se, Te) -- 9.6 Organic Chalcogenylamines RNEO (E = S, Se, Te) -- 9.7 S-Nitrosothiols RSNO -- 9.8 Cyclic Chalcogen-Nitrogen Oxides -- 9.8.1 Neutral compounds -- 9.8.2 The anions [S3N3Ox]- (x = 1, 2, 4), [E3N3O6]3- (E = S, Se) and [S4N5Ox]- (x = 1,2) -- Acyclic Organo Chalcogen-Nitrogen Compounds -- 10.1 Introduction -- 10.2 Chalcogenonitrosyls, RNE (E = S, Se) -- 10.3 N-Thiosulfinylamines, RNSS -- 10.4 Chalcogen Diimides RN=E=NR (E = S, Se Te) -- 10.4.1 Synthesis -- 10.4.2 Structures -- 10.4.3 Metal complexes -- 10.4.4 Reactions -- 10.5 Triimidochalcogenites, [E(NR)3]2- Sulfur Triimides, S(NR)3 55,56 -- 10.6 Tetraimidosulfate, [S(NtBu)4]2-, and Methylenetrimidosulfate, [H2CS(NtBu)3]2- -- 10.7 Chalcogen Diamides Ex(NR2)2, (E = S, Se, Te -- x = 1-4) -- 10.8 Organochalcogenyl Azides and Nitrenes92 -- 10.9 Trisulfenamides, (RS)3N, and the Radical [(PhS)2N].

10.10 Metal Complexes of Sulfimido, [Ph2S=N]-, and Sulfenamido, [RSNRŁ@ -- Five-membered Carbon-Nitrogen-Chalcogen Ring Systems: from Radicals to Functional Materials -- 11.1 Introduction -- 11.2 Four-membered Rings -- 11.3 Five-membered Rings -- 11.3.1 1,2,3,5-Dichalcogenadiazolium [RCNEEN]+ and dichalcogenadiazolyl [RCNEEN] rings (E = S, Se) -- 11.3.2 1,3,2,4-Dithiadiazolium, [RCNSNS]+, and dithiadiazolyl, [RCNSNS] rings -- 11.3.3 5-Oxo-1,3,2,4-dithiadiazole -- 11.3.4 1,2,3,4-Trithiazolium [RCNSSS]+ rings -- 11.3.5 1,2,3- and 1,3,2-Dithiazolium and dithiazolyl radicals -- 11.3.6 1,2,5-Chalcogenadiazoles -- Six-membered and Larger Carbon-Nitrogen- Chalcogen Ring Systems -- 12.1 Introduction -- 12.2 Six-membered Rings -- 12.2.1 Chalcogenatriazinyl Rings, [(RC)2N3E] (E = S, Se) -- 12.2.2 Dithiatriazines, RCN3S2 -- 12.2.3 Trithiadiazines, R2CN2S3 -- 12.2.4 Benzodithiadiazines, C6R4S2N2 (R = H, F) -- 12.3 Seven-membered Rings -- 12.3.1 Trithiadiazepines, (RC)2N2S3 -- 12.3.2 Trithiatriazepines, RCN3S3 -- 12.4 Eight-membered Rings -- 12.4.1 Dithiatetrazocines, (RC)2N4S2 -- 12.4.2 The trithiatetrazocine cation, [RCN4S3]+ -- 12.5 Bicyclic Ring Systems, RCN5S3 -- Heterocyclothia- And Selena-azenes -- 13.1 Introduction -- 13.2 Ring Systems Containing Two-coordinate Chalcogen1 -- 13.2.1 Cyclic systems of phosphorus(V) -- 13.2.2 Heterocyclothiazenes containing phosphorus(III) or other p-block elements -- 13.3 Ring Systems Containing Three-coordinate Chalcogen -- 13.4 Ring Systems Containing Four-coordinate Chalcogen -- Chalcogen-Nitrogen Chains And Polymers -- 14.1 Introduction -- 14.2 Poly(sulfur nitride), (SN)x, and Related Polymers1 -- 14.3 Sulfur-Nitrogen Chains -- 14.4 Sulfur-Nitrogen Polymers Containing Three-Coordinate Sulfur(IV) -- 14.5 Sulfur-Nitrogen Polymers Containing Four-Coordinate Sulfur(VI).

Weak Intramolecular Chalcogen-Nitrogen Interactions -- 15.1 Introduction -- 15.2 Molecular Structures -- 15.3 Solution Behaviour -- 15.4 Electronic Structures -- 15.5 Modification of Reactivity -- 15.6 Stabilization of Reactive Functional Groups -- Subject Index.