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Ringindex Upto50 1..48 Ring Index GEORGE NIKONOV Gainesville, Florida, USA with assistance of ALFRED L. FINOCCHIO Encenitas, California, USA This index lists the heterocyclic parent ring systems and has been compiled from the occurrences of those systems and their derivatives in Volumes 1-15 in the text, tables, equations, and schemes. Heterocycles have been included when they occur as a starting material, isolable intermediate, or a product, but not when they are reported as a nonisolable intermediate or a solvent. Compounds are generally classified according to their fully unsaturated parent compound (but see below). Thus substituted, partially saturated, and fully saturated derivatives of, for example, pyrrole are all indexed under pyrrole. Benzo and similar derivatives are included under the most unsaturated parent system (e.g., quinoline, thienofuran, etc.). For any given heterocyclic parent only one indicated hydrogen isomer appears in the text, typically the most stable or the lowest numbered form; thus all instances of pyran, whether of the 2H- or 4H-form, are indexed under 2H-pyran. The charges and additional valences for any heterocyclic parent structure are not indicated. The overall style follows that used in Chemical Abstracts and the first two editions of Comprehensive Heterocyclic Chemistry, but in order to keep the size of the index within reasonable bounds more attention has been paid to the monocyclic and bicyclic rings and only systems containing up to six fused rings have been included. For the same reason a limit on individual ring size in any system has been placed at 12 atoms. Also complexes of metals, clusters and carcass structures are not included. Heterocyclic systems can be named by various methods, depending on ring size, the presence of metal atoms, the availability of trivial names, etc. For this index the naming of the heterocyclic parents has generally followed the practices of IUPAC. Thus Hantzsch-Widman names have been employed for monocyclic systems and for the other systems when the smallest ring size is five atoms or more, but replacement nomenclature has usually been followed for bicyclic and higher systems when they contain three- and four-membered rings. The drawing of compounds and naming was done using CS ChemDraw Ultra program with an application of ACS setting. In addition to the name and structure of each parent system, the ring numbering of the system has also been given in every case. Index entries are divided into two categories, primary and secondary. Primary index entries (page numbers printed in bold) occur when a significant part of a chapter is devoted to a particular ring system. Secondary index entries occur when a heterocyclic system is mentioned in a chapter devoted to other systems. This may be, for example, as a starting material or as a product, or in a discussion comparing properties. 1 3 AsCP CGe2 Phospharsirane Digermirane 1, 718 1, 749–793 AsSiTe CIrSi 1H-Tellurarsasilirene Siliridacyclopropane 1, 679–693 1, 749–793 BXY C(M)N X,Y- C,N, elements Metallaziridine 1, 513–537; 1, 720 1, 749–793 CAs(M) C(M)P Metallaarsirane Metallaphosphirane 1, 749–793 1, 749–793 CB2 C(M)S Diborirane Metallathiirane 1, 759 1, 749–793 C(M)Si 3H-Diborirene Metallasilirane 1, 759 1, 749–793 CCoP CMnN Phosphacobaltacyclopropane Azamanganacyclopropane 1, 749–793 1, 749–793 CFeP CMnP Phosphaferracyclopropane Phosphamanganacyclopropane 1, 749–793 1, 749–793 CFeS CMoP Thiaferracyclopropane Phosphamolybdacyclopropane 1, 749–793 1, 749–793 CGeS CMoS Thiagermirane Thiamolybdacyclopropane 1, 787 1, 749–793 CNNi Thiagermirene Azanickelacyclopropane 1, 787 1, 749–793 CGeSe CNO Selenagermirane Oxaziridine 1, 787 1, 559–621 CGeTe Telluragermirane Oxazirine 1, 787 1, 559–621 2 3 Ring Index (3) CPRu CNP CORe 2H-Azaphosphirene Oxarhenacyclopropane 1, 712, 715 1, 749–793 CNRe COS Azarhenacyclopropane Oxathiirene 1, 749–793 1, 641–677 CNS COTi Thiazirene Oxatitanacyclopropane 1, 623–640 1, 749–793 COV Thiazirene Oxavanadacyclopropane 1, 623–640 1, 749–793 CNSe COW Selenazirine Oxatungstacyclopropane 1, 679–693 1, 749–793 CNSi COZr Azasiliridine Oxazirconacyclopropane 1, 773, 773–774 1, 749–793 CNV COsP Azavanadacyclopropane Phosphosmacyclopropane 1, 749–793 1, 749–793 COsS Azatungstacyclopropane Thiosmacyclopropane 1, 749–793 1, 749–793 CNZr COsSe Azazirconacyclopropane Selenosmacyclopropane 1, 749–793 1, 749–793 CNbO COsTe Oxaniobacyclopropane Tellurosmacyclopropane 1, 749–793 1, 679–693 CO CN2 2 Diaziridine Dioxirane 1, 539–557 1, 641–677; 6, 150f CPPt 3H-Diazirine Phosphaplatinacyclopropane 1, 539–557; 5, 508 1, 749–793 COFe CPRe Oxaferracyclopropane Phospharhenacyclopropane 1, 749–793 1, 749–793 COOs CPRu Oxosmacyclopropane Phospharuthenacyclopropane 1, 749–793 1, 749–793 CPSb Ring Index (3) 4 CPSb Disilirene Phosphastibirane 1, 770 1, 719 CSn2 CPSe Distannirane Selenaphosphirene 1, 786 1, 679–693 CS2 CPSi Dithiirane Phosphasilirane 1, 641–677 1, 773–774 CPW Dithiirane Phosphatungstacyclopropane 1, 641–677 1, 749–793 C2B Borirane CPb2 Diplumbirane 1, 513–537 1, 770 1H-Borirene CPdS 1, 513–537 Thiapalladacyclopropane 1, 749–793 C2Ge Germirane CP 2 1, 483–512 Diphosphirane 1, 695–747, 696, 720, 733 C2N Aziridine 1, 1–104; 6, 100; 7, 290, 290; 9, 337; 2,82 1H-Diphosphirene 1, 715 1H-Azirine 1, 82; 1, 105–172; 4, 522, 8, 500 3H-Diphosphirene 1, 713, 720, 733 CSW 2H-Azirene Thiatungstacyclopropane 1, 105–172, 151; 6, 155t; 6, 165t 1, 749–793 C2O CSZr Oxirane Thiazirconacyclopropane 1, 173–233; 2, 351, 2, 783, 784 1, 749–793 CSeSi Oxirene Selenasilirene 1, 173–233, 215; 6, 153f; 6, 169f; 1, 641–677 6, 182–183 CSiW C2P Silatungstacyclopropane Phosphirane 1, 749–793 1, 457–481 CSi2 Disilirane 1H-Phosphirene 1, 770 1, 457–481; 2, 896; 2, 931 5 Ring Index (3) Si3 C2S C2Te Thiirane Tellurirane 1, 299–390; 2, 416 1, 433–453 GeSi2 Thiirene Disilagermacycloprop-1-ene 1, 299–390; 6, 182; 8, 662 6, 669 C2Se Ge2Si Selenirane Siladigermacyclopropane 1, 433–453 2, 954–955; 3, 1206 Selenirene 1-Sila-2,3-digermacycloprop-2-ene 1, 433–453 2, 964, 969 C2Si Ge3 Silirane Trigermilcyclopropane 3, 1213–1214 2, 955; 3, 1206 1H-Silirene 1H-Trigermirene 1, 483–512; 2, 931; 3, 1214 2, 964 C2Sn PSeC 1H-Stannirene Selenaphosphorirane 1, 483–512 1, 679–693 C(M)O Si3 Metallaoxirane Trisilacyclopropane 1, 749–793 2, 955 4 C(X)(Y)(Z) 1,2,3-Trisheteraetane [1,3]Digermetane 2, 939–972 2, 907–938 [1,2]Digermete 1,2,3-Trisheteraetene 2, 911, 926; 9, 932 2, 939–972 C2NO 4H-1,2-Oxazete CGe O 2 2, 689–711 [1,2,4]Oxadigermetane 1, 782 [1,2]Oxazetidine CGe2S 2, 689–711 [1,2,4]Thiadigermetane 1, 782 [1,3]Oxazetidine CGe2Se 2, 689–711 [1,2,4]Selenadigermetane 1, 782 C2NS 2H-[1,2]Thiazete 2, 713–773 CN2P [1,3,2]Diazaphosphetidine 2, 939–972 4H-1,2-Thiazete 2, 713–773 C2As2 [1,3]Diarsetane 2, 889; 9, 893 [1,3]Thiazetidine 2, 713–773, 759 C2GeO [1,2]Oxagermetane C2NSe 2, 924, 924–925 [1,2]Selenazetidine 2, 853–874 C GeS 2 C N [1,2]Thiagermetane 2 2 1,2-Diazete 2, 917 2, 623–687 C2GeSe 2H-[1,2]Selenagermete 1,3-Diazete 2, 853–874 2, 623–687 C2GeTe [1,2]Telluragermetane [1,2]Diazete 2, 853–874 2, 667 C2Ge2 [1,2]Digermetane 1,2-Dihydro-[1,2]diazete 1, 489; 2, 917 2, 623–687 6 7 Ring Index (4) C2SeTe 1,2-Dihydro-[1,3]diazete [1,2]Dioxetane 2, 623–687 2, 775–794 1,4-Dihydro-[1,2]diazete 1,2-Dioxete 9, 440; 2, 623–687 2, 775–794 C2PSe 3,4-Dihydro-[1,2]diazete [1,2]Selenaphosphetane 2, 623–687 2, 853–874 [1,2]Diazetidine [1,3]Selenaphosphetane 2, 623–687 2, 853–874 C2PSi [1,3]Diazetidine 1,2-Dihydro-[1,2]phosphasilete 2, 623–687 1, 701f; 2, 907–938; 2, 907–938 C2OS 1,2-Oxathiete [1,2]Phosphasiletane 2, 795–809 2, 917 C2Ps 1,3-Oxathietane [1,3]Diphosphetane 2, 795–809 2, 876 C2P2 [1,2]Oxathietane 1,2-Diphosphete 2, 795–809 1, 469; 2, 875–905 C2OSe 1,3-Oxaselenetane 1,3-Diphosphete 2, 853–874 2, 876; 9, 838, 839 [1,2]Oxaselenetane 1,2-Dihydro-[1,2]diphosphete 2, 853–874 1, 469, 469 C SSi C2OSi 2 2H-1,2-Oxasilete 2H-1,2-Thiasilete 2, 907–938 2, 907–938 [1,3]Oxasiletane [1,3]Thiasiletane 2, 912–913, 924, 925 2, 912–913 C2OTe C2Sb2 [1,2]Oxatelluretane [1,2]Distibetane 2, 853–874 2, 889 C2O2 C2SeTe 1,3-Dioxetane 1,3-Selenatelluretane 2, 775–794; 9, 397 2, 853–874 C2Se2 Ring Index (4) 8 C Se 2 2 Metallacyclobutenes 1,2-Diselenete 2, 555–621 2, 853–874 1,3-Diselenetane Boretane 2, 853–874 2, 555–621 C3(M) [1,2]Diselenetane Metallacyclobutanes 2, 853–874 2, 555–621 C3As C2Si2 Arsete 1,2-Dihydro-1,2-Disilete 2, 479–512 1, 508–509 Arsete 1,2-Disilete 2, 555–621 2, 853–874; 2, 907–938 C3B Borete 2, 555–621 [1,3]Disiletane 2, 521 C3B Boretane 2, 555–621 [1,3]Disiletane 2, 907–938, 910, 918, 918, 921, 922 C3Bi Bismuthete 2, 479–512; 2, 555–621 C2SnTe [1,2]Tellurastannetane 2, 853–874 C3Co 1-Cobaltacyclobuta-1,3-diene 2, 555–621 C2S2 1,3-Dithietane C3Fe 2, 811–852; 6, 469f; 6, 476f 1-Ferracyclobuta-1,3-diene 2, 555–621 1,2-Dithiete C3Ge 2, 811–852 Germetane 2, 513–554 C3Ir [1,2]Dithietane 1-Iridacyclobuta-1,3-diene 2, 811–852 2, 555–621 C2Te2 C3Mo 1,3-Ditelluretane 1-Molybdacyclobuta-1,3-diene 2, 853–874 2, 555–621 C3N C3B 2,3-Dihydro-borete Azete 2, 555–621 2, 704–705; 2, 94, 96; 5, 224; 6, 173t 9 Ring Index (4) P2Se2 Azetidine Thietane 1,38f, 88; 2, 239–319, 2, 389–428 240; 9, 323; 2; 3,36 C3Sb 1,2-Dihydro-stibete 1,2-Dihydro-azete 2, 505 2,87 C3Se Selenetane 2,3-Dihydro-azete 2, 463–477 2,87 C3Ni 2H-Selenete 1-Nickelacyclobuta-1,3-diene 2, 463–477 2, 555–621 C3Si C3O Siletane 2H-Oxete 1, 494 2, 321–364 C3Ta 1-Tantalacyclobuta-1,3-diene Oxetane 2, 555–621 2, 321–364 C3Te C3P Telluretane 1,2-Dihydro-phosphete 2, 463–477 4, 1164; 14, 921–922 2H-Tellurete C3Pd 1-Palladacyclobuta-1,3-diene
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