List of straight-chain alkanes

The following is a list of straight-chain alkanes, the total number of isomers of each (including branched chains), and their common names, sorted by number of carbon atoms.^[1][2]

Number of C atoms	Number of isomers[3][4]	Number of isomers including stereoisomers[3][5]	Molecular Formula	Name of straight chain	Synonyms
1	1	1	CH4	methane	methyl hydride; natural gas
2	1	1	C2H6	ethane	dimethyl; ethyl hydride; methyl methane
3	1	1	C3H8	propane	dimethyl methane; propyl hydride
4	2	2	C4H10	n-butane	butyl hydride; methylethyl methane
5	3	3	C5H12	n-pentane	amyl hydride; Skellysolve A
6	5	5	C6H14	n-hexane	dipropyl; Gettysolve-B; hexyl hydride; Skellysolve B
7	9	11	C7H16	n-heptane	dipropyl methane; Gettysolve-C; heptyl hydride; Skellysolve C
8	18	24	C8H18	n-octane	dibutyl; octyl hydride
9	35	55	C9H20	n-nonane	nonyl hydride; Shellsol 140
10	75	136	C10H22	n-decane	decyl hydride
11	159	345	C11H24	n-undecane	hendecane
12	355	900	C12H26	n-dodecane	adakane 12; bihexyl; dihexyl; duodecane
13	802	2412	C13H28	n-tridecane
14	1858	6563	C14H30	n-tetradecane
15	4347	18127	C15H32	n-pentadecane
16	10359	50699	C16H34	n-hexadecane	cetane
17	24894	143255	C17H36	n-heptadecane
18	60523	408429	C18H38	n-octadecane
19	148284	1173770	C19H40	n-nonadecane
20	366319	3396844	C20H42	n-icosane	didecyl icosane
21	910726	9892302	C21H44	n-heneicosane	henicosane
22	2278658	28972080	C22H46	n-docosane
23	5731580	85289390	C23H48	n-tricosane
24	14490245	252260276	C24H50	n-tetracosane
25	36797588	749329719	C25H52	n-pentacosane
26	93839412	2234695030	C26H54	n-hexacosane	cerane
27	240215803	6688893605	C27H56	n-heptacosane
28	617105614	20089296554	C28H58	n-octacosane
29	1590507121	60526543480	C29H60	n-nonacosane
30	4111846763	182896187256	C30H62	n-triacontane
31	10660307791	554188210352	C31H64	n-hentriacontane	untriacontane
32	27711253769	1683557607211	C32H66	n-dotriacontane	dicetyl
33	72214088660	5126819371356	C33H68	n-tritriacontane
34	188626236139	15647855317080	C34H70	n-tetratriacontane
35	493782952902	47862049187447	C35H72	n-pentatriacontane
36	1295297588128	146691564302648	C36H74	n-hexatriacontane
37	3404490780161	450451875783866	C37H76	n-heptatriacontane
38	8964747474595	1385724615285949	C38H78	n-octatriacontane
39	23647478933969	4270217915878409	C39H80	n-nonatriacontane
40	62481801147341	13180446189326135	C40H82	n-tetracontane
41	165351455535782	40745751356421890	C41H84	n-hentetracontane
42	438242894769226	126146261761339138	C42H86	n-dotetracontane
43	1163169707886427	391089580997271932	C43H88	n-tritetracontane
44	3091461011836856	1214115357550059889	C44H90	n-tetratetracontane
45	8227162372221203	3773978539594435261	C45H92	n-pentatetracontane
46	21921834086683418	1.17454674499017×1019	C46H94	n-hexatetracontane
47	58481806621987010	3.65973634249825×1019	C47H96	n-heptatetracontane
48	156192366474590639	1.14160680977903×1020	C48H98	n-octatetracontane
49	417612400765382272	3.56492605035317×1020	C49H100	n-nonatetracontane
50	1117743651746953270	1.11437894744930×1021	C50H102	n-pentacontane
51	2994664179967370611	3.48695195511947×1021	C51H104	n-henpentacontane
52	8031081780535296591	1.09212674104354×1022	C52H106	n-dopentacontane
53	2.15577719135726×1019	3.42372129990732×1022	C53H108	n-tripentacontane
54	5.79191808731484×1019	1.07425456458975×1023	C54H110	n-tetrapentacontane
55	1.55745431857550×1020	3.37353654348452×1023	C55H112	n-pentapentacontane
56	4.19149571193412×1020	1.06027803437626×1024	C56H114	n-hexapentacontane
57	1.12893957836133×1021	3.33501408819192×1024	C57H116	n-heptapentacontane
58	3.04304357190683×1021	1.04980159528436×1025	C58H118	n-octapentacontane
59	8.20861536686375×1021	3.30702230705762×1025	C59H120	n-nonapentacontane
60	2.21587345357704×1022	1.04250134336061×1026	C60H122	n-hexacontane
61	5.98580978477069×1022	3.28863382009164×1026	C61H124	n-henhexacontane
62	1.61805725349297×1023	1.03811173709570×1027	C62H126	n-dohexacontane
63	4.37671691526159×1023	3.27908841257682×1027	C63H128	n-trihexacontane
64	1.18461618538531×1024	1.03641522884615×1028	C64H130	n-tetrahexacontane
65	3.20828506618148×1024	3.27776398697850×1028	C65H132	n-pentahexacontane
66	8.69413071202487×1024	1.03723411195159×1029	C66H134	n-hexahexacontane
67	2.35737961344482×1025	3.28415364073692×1029	C67H136	n-heptahexacontane
68	6.39551595273481×1025	1.04042406553793×1030	C68H138	n-octahexacontane
69	1.73603007393950×1026	3.29784745978795×1030	C69H140	n-nonahexacontane
70	4.71484798515330×1026	1.04586901217870×1031	C70H142	n-heptacontane
71	1.28115131576464×1027	3.31851797512264×1031	C71H144	n-henheptacontane
72	3.48296574914069×1027	1.05347699979053×1032	C72H146	n-doheptacontane
73	9.47344738680449×1027	3.34590848928408×1032	C73H148	n-triheptacontane
74	2.57793062389544×1028	1.06317688936105×1033	C74H150	n-tetraheptacontane
75	7.01832115122141×1028	3.37982367012913×1033	C75H152	n-pentaheptacontane
76	1.91156381393249×1029	1.07491568187130×1034	C76H154	n-hexaheptacontane
77	5.20874195248907×1029	3.42012195021483×1034	C77H156	n-heptaheptacontane
78	1.41990891534395×1030	1.08865635628610×1035	C78H158	n-octaheptacontane
79	3.87228257513701×1030	3.46670937556328×1035	C79H160	n-nonaheptacontane
80	1.05644769069467×1031	1.10437611939016×1036	C80H162	n-octacontane
81	2.88336094362773×1031	3.51953462699296×1036	C81H164	n-henoctacontane
82	7.87255854643910×1031	1.12206499012211×1037	C82H166	n-dooctacontane
83	2.15027809474797×1032	3.57858499756067×1037	C83H168	n-trioctacontane
84	5.87531723826577×1032	1.14172465774427×1038	C84H170	n-tetraoctacontane
85	1.60591377849471×1033	3.64388315587311×1038	C85H172	n-pentaoctacontane
86	4.39100290809332×1033	1.16336756600997×1039	C86H174	n-hexaoctacontane
87	1.20102579077569×1034	3.71548456067735×1039	C87H176	n-heptaoctacontane
88	3.28612955581209×1034	1.18701618541837×1040	C88H178	n-octaoctacontane
89	8.99409590248916×1034	3.79347541983580×1040	C89H180	n-nonaoctacontane
90	2.46245150242821×1035	1.21270244338682×1041	C90H182	n-nonacontane
91	6.74391606297983×1035	3.87797110845861×1041	C91H184	n-hennonacontane
92	1.84751504801261×1036	1.24046728824609×1042	C92H186	n-dononacontane
93	5.06281811212116×1036	3.96911497803001×1042	C93H188	n-trinonacontane
94	1.38778575295845×1037	1.27036036776471×1043	C94H190	n-tetranonacontane
95	3.80518360708038×1037	4.06707750189460×1043	C95H192	n-pentanonacontane
96	1.04363664561059×1038	1.30243980672744×1044	C96H194	n-hexanonacontane
97	2.86312976836850×1038	4.17205571326637×1044	C97H196	n-heptanonacontane
98	7.85684759853088×1038	1.33677207115080×1045	C98H198	n-octanonacontane
99	2.15659631984508×1039	4.28427290059784×1045	C99H200	n-nonanonacontane
100	5.92107203812581×1039	1.37343190918329×1047	C100H202	n-hectane
101	1.62607500143337×1040		C101H204	n-henihectane
102	4.46670631687268×1040		C102H206	n-dohectane
103	1.22726610195426×1041		C103H208	n-trihectane
104	3.37281538963752×1041		C104H210	n-tetrahectane
105	9.27143441542280×1041		C105H212	n-pentahectane
106	2.54917652030591×1042		C106H214	n-hexahectane
107	7.01051065630088×1042		C107H216	n-heptahectane
108	1.92838773361102×1043		C108H218	n-octahectane
109	5.30557278101059×1043		C109H220	n-nonahectane
110	1.46002972524313×1044		C110H222	n-decahectane
111	4.01865724190509×1044		C111H224	n-undecahectane
112	1.10633962543222×1045		C112H226	n-dodecahectane
113	3.04636987596851×1045		C113H228	n-tridecahectane
114	8.38999942017075×1045		C114H230	n-tetradecahectane
115	2.31113265930118×1046		C115H232	n-pentadecahectane
116	6.36751554673601×1046		C116H234	n-hexadecahectane
117	1.75467195960063×1047		C117H236	n-heptadecahectane
118	4.83616671898832×1047		C118H238	n-octadecahectane
119	1.33316731232142×1048		C119H240	n-nonadecahectane
120	3.67574018395043×1048		C120H242	n-icosahectane

See also

• Higher alkane
• List of compounds with carbon numbers 50+

References

1. "organic chemistry - How to determine number of structural isomers?". Stack Exchange. Retrieved 29 March 2019.
2. "Paraffins - Rosetta Code". rosettacode.org. 13 January 2019. Retrieved 29 March 2019.
3. Fujita, Shinsaku (2007). "Alkanes as Stereoisomers. Enumeration by the Combination of Two Dichotomies for Three-Dimensional Trees" (PDF). MATCH Commun. Math. Comput. Chem. 57 (2): 328 (PDF p. 30). ISSN 0340-6253. Retrieved 29 March 2019.
4. Sloane, N. J. A. (ed.). "Sequence A000602". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
5. Sloane, N. J. A. (ed.). "Sequence A000628". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.