150:
31:
160:
atoms and not to any hydrogen atoms, and the carbon attached to the nitrogen atom, which is attached to two hydrogen atoms (far right). There is a five-carbon-atom poly-methine chain in the center of this molecule.
120:
The name "methine" is also widely used in non-systematic nomenclature for the methanetriyl group (IUPAC): a carbon atom with four single bonds, where one bond is to a hydrogen atom (
86:
339:
1258:
1263:
132:
Two or more methine bridges can overlap, forming a chain or ring of carbon atoms connected by alternating single and double bonds, as in
332:
306:
270:
1162:
1286:
735:
325:
156:
Every carbon atom in this molecule is a methine carbon atom, except for three; two that are attached to the two
772:
1245:
1145:
249:
1291:
1252:
1140:
243:
1221:
666:
179:
527:
108:
100:
This group is sometimes called "methylidyne", however that name belongs properly to either the
1211:
1181:
939:
561:
165:
101:
39:
916:
410:
348:
225:
51:
1135:
894:
889:
872:
855:
656:
405:
208:
311:
in the
Chemical Entities of Biological Interest (ChEBI) database. Accessed on 2015-03-05.
1206:
1201:
1077:
1072:
1067:
860:
827:
611:
593:
583:
1280:
1226:
1174:
1105:
991:
981:
976:
966:
961:
911:
906:
822:
817:
807:
661:
616:
578:
566:
537:
66:
1157:
1044:
1039:
1016:
767:
606:
532:
469:
464:
442:
398:
383:
373:
191:
1216:
1169:
1130:
1011:
899:
884:
879:
867:
432:
427:
393:
388:
378:
356:
70:
1125:
1116:
996:
951:
847:
812:
802:
742:
678:
601:
549:
133:
17:
1092:
1006:
971:
956:
944:
787:
762:
571:
149:
1100:
1054:
1021:
717:
623:
497:
452:
437:
157:
74:
1062:
986:
837:
832:
797:
782:
777:
747:
730:
554:
481:
447:
169:
58:
1150:
1082:
926:
635:
628:
522:
503:
492:
476:
422:
62:
317:
107:(connected to the rest of the molecule by a triple bond) or to the
30:
1031:
1001:
934:
792:
757:
752:
725:
673:
640:
544:
368:
280:
29:
459:
321:
148:
164:
Chains of alternating single and double bonds often form
117:(the two atoms as a free molecule with dangling bonds).
1194:
1114:
1091:
1053:
1030:
925:
846:
716:
693:
649:
592:
515:
490:
355:
333:
8:
713:
512:
340:
326:
318:
279:Chemical Entities of Biological Interest (
174:
142:
138:
73:, where one of the single bonds is to a
262:
7:
25:
34:Methine or methylylidene (IUPAC)
1:
182:character to the compound.
77:. The group is also called
1308:
1235:
65:atom bound by two single
57:, derived formally from
1246:chemical classification
271:"Methanylylidene group
153:
35:
1253:chemical nomenclature
168:. When closed, as in
152:
33:
27:Chemical group (=CH–)
128:Overlapping methines
709:not C, H or O)
250:Methylylidyne group
109:methylidyne radical
89:systematic name is
61:. It consists of a
1151:Hypervalent iodine
308:Methanetriyl group
244:Methanetriyl group
178:, they often give
166:conjugated systems
154:
146:, or the compound
36:
1287:Functional groups
1274:
1273:
1212:Sulfenyl chloride
1190:
1189:
689:
688:
508:(only C, H and O)
349:Functional groups
102:methylidyne group
40:organic chemistry
16:(Redirected from
1299:
1241:
1146:Trifluoromethoxy
714:
710:
513:
509:
362:
342:
335:
328:
319:
312:
303:
297:
294:
291:
290:
267:
239:
238:
237:
228:or methanediyl −
226:Methylene bridge
222:
221:
220:
211:or methylidene =
205:
204:
203:
177:
145:
123:
116:
106:
56:
52:functional group
21:
1307:
1306:
1302:
1301:
1300:
1298:
1297:
1296:
1277:
1276:
1275:
1270:
1239:
1231:
1186:
1141:Trichloromethyl
1136:Trifluoromethyl
1110:
1087:
1049:
1026:
921:
890:Phosphine oxide
842:
708:
706:
705:
703:
701:
699:
697:
695:
685:
645:
588:
507:
506:
501:
496:
486:
360:
359:
351:
346:
316:
315:
304:
300:
288:
286:
269:
268:
264:
259:
236:
233:
232:
231:
229:
219:
216:
215:
214:
212:
209:Methylene group
202:
199:
198:
197:
195:
188:
176:
172:
144:
140:
136:
130:
121:
111:
104:
95:methanylylidene
54:
50:is a trivalent
28:
23:
22:
15:
12:
11:
5:
1305:
1303:
1295:
1294:
1289:
1279:
1278:
1272:
1271:
1269:
1268:
1267:
1266:
1261:
1249:
1242:
1236:
1233:
1232:
1230:
1229:
1227:Sulfinylamines
1224:
1219:
1214:
1209:
1207:Phosphoramides
1204:
1202:Isothiocyanate
1198:
1196:
1192:
1191:
1188:
1187:
1185:
1184:
1179:
1178:
1177:
1167:
1166:
1165:
1155:
1154:
1153:
1148:
1143:
1138:
1133:
1122:
1120:
1112:
1111:
1109:
1108:
1103:
1097:
1095:
1089:
1088:
1086:
1085:
1080:
1078:Selenenic acid
1075:
1073:Seleninic acid
1070:
1068:Selenonic acid
1065:
1059:
1057:
1051:
1050:
1048:
1047:
1042:
1036:
1034:
1028:
1027:
1025:
1024:
1019:
1014:
1009:
1004:
999:
994:
989:
984:
979:
974:
969:
964:
959:
954:
949:
948:
947:
937:
931:
929:
923:
922:
920:
919:
914:
909:
904:
903:
902:
892:
887:
882:
877:
876:
875:
865:
864:
863:
861:Phosphodiester
852:
850:
844:
843:
841:
840:
835:
830:
825:
820:
815:
810:
805:
800:
795:
790:
785:
780:
775:
770:
765:
760:
755:
750:
745:
740:
739:
738:
733:
722:
720:
711:
707:(one element,
691:
690:
687:
686:
684:
683:
682:
681:
671:
670:
669:
664:
653:
651:
647:
646:
644:
643:
638:
633:
632:
631:
621:
620:
619:
614:
609:
598:
596:
590:
589:
587:
586:
584:Methylenedioxy
581:
576:
575:
574:
569:
559:
558:
557:
552:
542:
541:
540:
530:
525:
519:
517:
510:
488:
487:
485:
484:
479:
474:
473:
472:
467:
457:
456:
455:
450:
445:
440:
435:
430:
420:
419:
418:
413:
403:
402:
401:
396:
391:
386:
381:
376:
365:
363:
361:(only C and H)
353:
352:
347:
345:
344:
337:
330:
322:
314:
313:
298:
261:
260:
258:
255:
254:
253:
247:
241:
234:
223:
217:
206:
200:
187:
184:
129:
126:
48:methine bridge
26:
24:
18:Methine bridge
14:
13:
10:
9:
6:
4:
3:
2:
1304:
1293:
1290:
1288:
1285:
1284:
1282:
1265:
1262:
1260:
1257:
1256:
1255:
1254:
1250:
1248:
1247:
1243:
1238:
1237:
1234:
1228:
1225:
1223:
1220:
1218:
1215:
1213:
1210:
1208:
1205:
1203:
1200:
1199:
1197:
1193:
1183:
1180:
1176:
1173:
1172:
1171:
1168:
1164:
1161:
1160:
1159:
1156:
1152:
1149:
1147:
1144:
1142:
1139:
1137:
1134:
1132:
1129:
1128:
1127:
1124:
1123:
1121:
1119:
1118:
1113:
1107:
1106:Telluroketone
1104:
1102:
1099:
1098:
1096:
1094:
1090:
1084:
1081:
1079:
1076:
1074:
1071:
1069:
1066:
1064:
1061:
1060:
1058:
1056:
1052:
1046:
1043:
1041:
1038:
1037:
1035:
1033:
1029:
1023:
1020:
1018:
1015:
1013:
1010:
1008:
1005:
1003:
1000:
998:
995:
993:
992:Sulfonic acid
990:
988:
985:
983:
982:Sulfinic acid
980:
978:
977:Thiosulfonate
975:
973:
970:
968:
967:Thiosulfinate
965:
963:
962:Sulfenic acid
960:
958:
955:
953:
950:
946:
943:
942:
941:
938:
936:
933:
932:
930:
928:
924:
918:
917:Phosphaallene
915:
913:
912:Phosphaalkyne
910:
908:
907:Phosphaalkene
905:
901:
898:
897:
896:
893:
891:
888:
886:
883:
881:
878:
874:
871:
870:
869:
866:
862:
859:
858:
857:
854:
853:
851:
849:
845:
839:
836:
834:
831:
829:
826:
824:
821:
819:
816:
814:
811:
809:
806:
804:
801:
799:
796:
794:
791:
789:
786:
784:
781:
779:
776:
774:
771:
769:
766:
764:
761:
759:
756:
754:
751:
749:
746:
744:
741:
737:
734:
732:
729:
728:
727:
724:
723:
721:
719:
715:
712:
692:
680:
677:
676:
675:
672:
668:
665:
663:
660:
659:
658:
655:
654:
652:
648:
642:
639:
637:
634:
630:
627:
626:
625:
622:
618:
615:
613:
610:
608:
605:
604:
603:
600:
599:
597:
595:
591:
585:
582:
580:
579:Ethylenedioxy
577:
573:
570:
568:
565:
564:
563:
560:
556:
553:
551:
548:
547:
546:
543:
539:
536:
535:
534:
531:
529:
526:
524:
521:
520:
518:
514:
511:
505:
499:
494:
489:
483:
480:
478:
475:
471:
468:
466:
463:
462:
461:
458:
454:
451:
449:
446:
444:
441:
439:
436:
434:
431:
429:
426:
425:
424:
421:
417:
414:
412:
409:
408:
407:
404:
400:
397:
395:
392:
390:
387:
385:
382:
380:
377:
375:
372:
371:
370:
367:
366:
364:
358:
354:
350:
343:
338:
336:
331:
329:
324:
323:
320:
310:
309:
302:
299:
296:
293:
282:
278:
275:
274:
266:
263:
256:
251:
248:
245:
242:
227:
224:
210:
207:
193:
190:
189:
185:
183:
181:
171:
167:
162:
159:
151:
147:
141:C=CH−CH=CH−CH
135:
127:
125:
118:
114:
110:
103:
98:
96:
92:
91:methylylidene
88:
84:
80:
76:
72:
68:
64:
60:
53:
49:
45:
44:methine group
41:
32:
19:
1292:Substituents
1251:
1244:
1158:Vinyl halide
1115:
1045:Borinic acid
1040:Boronic acid
1017:Thioxanthate
415:
357:Hydrocarbons
307:
301:
295:
287:. Retrieved
284:
276:
272:
265:
192:Methyl group
163:
155:
131:
119:
112:
99:
94:
90:
82:
78:
47:
43:
37:
1222:Thiocyanate
1217:Sulfonamide
1182:Perchlorate
1170:Acyl halide
1131:Fluoroethyl
1012:Thionoester
900:Phosphonium
885:Phosphinate
880:Phosphonous
868:Phosphonate
567:Hydroperoxy
389:Cyclopropyl
71:double bond
1281:Categories
1126:Haloalkane
997:Thioketone
952:Persulfide
848:Phosphorus
813:Isocyanate
803:Isonitrile
704:or oxygen
702:hydrogen,
698:not being
679:Orthoester
572:Dioxiranes
550:Enol ether
438:1-Propenyl
289:2015-03-05
283:) database
257:References
134:piperylene
85:, but its
1259:inorganic
1093:Tellurium
1007:Thioester
972:Sulfoxide
957:Disulfide
945:Sulfonium
895:Phosphine
873:Phosphite
856:Phosphate
788:Carbamate
763:Hydrazone
696:element,
694:Only one
667:Anhydride
406:Methylene
173:(=CH−CH=)
1240:See also
1175:Chloride
1101:Tellurol
1055:Selenium
1022:Xanthate
736:Ammonium
718:Nitrogen
700:carbon,
657:Carboxyl
624:Aldehyde
612:Acryloyl
594:carbonyl
498:hydrogen
453:Cumulene
186:See also
180:aromatic
158:nitrogen
75:hydrogen
69:and one
1264:organic
1063:Selenol
987:Sulfone
940:Sulfide
838:NONOate
833:Nitroso
823:Nitrite
818:Nitrate
808:Cyanate
798:Nitrile
783:Amidine
778:Imidate
748:Nitrene
743:Hydrazo
731:Enamine
662:Acetoxy
650:carboxy
617:Benzoyl
555:Epoxide
538:Methoxy
528:Alcohol
482:Carbene
416:Methine
305:(2007)
246:>CH−
170:benzene
122:>CH−
83:methene
79:methyne
59:methane
1163:Iodide
1083:Selone
927:Sulfur
636:Ketone
629:Ketene
607:Acetyl
562:Peroxy
533:Alkoxy
523:Acetal
504:oxygen
493:carbon
477:Alkyne
470:Benzyl
465:Phenyl
448:Allene
443:Crotyl
423:Alkene
411:Bridge
399:Pentyl
384:Propyl
374:Methyl
285:. 2007
63:carbon
1195:Other
1032:Boron
1002:Thial
935:Thiol
828:Nitro
793:Imide
773:Amide
758:Oxime
753:Imine
726:Amine
674:Ester
641:Ynone
545:Ether
516:R-O-R
491:Only
433:Allyl
428:Vinyl
394:Butyl
379:Ethyl
369:Alkyl
281:ChEBI
87:IUPAC
67:bonds
1117:Halo
602:Acyl
502:and
460:Aryl
55:=CH−
42:, a
768:Azo
252:≡C−
124:).
105:≡CH
93:or
81:or
46:or
38:In
1283::
500:,
495:,
277:.
230:CH
213:CH
196:CH
115:CH
97:.
341:e
334:t
327:v
292:.
273:"
240:−
235:2
218:2
201:3
194:−
175:3
143:3
139:2
137:H
113:⫶
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
