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EXPLANATION OF TABLE

The ordering method used here is basically the well known Hill system with only one significant difference; whenever possible, structural formulae are used in preference to empirical formulae. Therefore CH₃CNH⁺ would not appear as C₂H₄N⁺.

All carbon and hydrocarbon ions containing the same number of carbon atoms the ion contains. The greater the numbers of carbons, the further down the table the ions appear.

Within groups of ions containing the same number of carbon atoms, ions are ordered according to the number of hydrogen atoms in the ion. If ions contain the same number of Hydrogen, then the order is dependent alphabetically and numerically on the remaining atoms in the ion. For example, HC₃N⁺ precedes C₃HO⁺, which in turn precedes C₃O⁺.

Molecules, which do not contain carbon, are listed alphabetically, the earliest letter alphabetically taking precedence (e.g. NH₃ precedes C₃O⁺).

The only exceptions to the above sequencing rules are larger cluster ions, for which the molecules in the cluster ion appear in strictly alphabetically order. C₄H₂⁺. C₂N₂ would therefore appear before C₅H⁺ and after C₄H₂⁺. It would not be listed after the C₆H⁺ ion.

The table is according to the reactant ion in the chemical equation. When reactant ions are the same for different reactions, the reactions are ordered according to the neutral reactant in the manner described above.

Deuterium is treated as a separate atom from hydrogen, and molecules containing deuterium precedes molecules containing hydrogen, provided the number of carbons is the same. For example C₂D₂ precedes C₂H₂. The collision rate constants included in the tabulation, k_c, are derived from the combined variational transition state- classical trajectory treatment of T. Su and W.J. Chesnavich, J. Chem. Phys., 76, 5183(1982). Collision rate constants for reactions involving deuterated molecules (other than D₂) are assumed to be equal to their hydrogen analogous.

Rate constants are measures in units of 10^-9 cm³ molecule^-1s^-1. The experiments were conducted at 296 ± 2K using the SIFT technique. The accuracy of the rate constants is estimated to be better then ± 30%.

ION/NEUTRAL REACTION	BR	k_exp	k_c	REFERENCES

C⁺ + CH₄ = C₂H₃⁺ + H	0.75	1.3	1.43	1
= C₂H₂⁺ + H₂	0.25
C⁺ + CO =		<0.0005	1.18	2
C⁺ + C₂H₂ = C₃H⁺ + H	1.0	2.2		1
C⁺ + C₂H₄ = C₃H₂⁺ + H₂	0.4	1.3	1.49	1
= C₃H₃⁺ + CH₃	0.3
= C₂H₄⁺ + C	0.15
= C₂H₃⁺ + CH	0.15
C⁺ + C₂H₆ = C₃H₃⁺ + H₂ + H	0.3	1.6		1
= C₂H₃⁺ + CH₃	0.3
= C₂H₄⁺ + CH₂	0.2
= C₂H₅⁺ + CH	0.2
C⁺ + C₂N₂ = C₂N⁺ + CN	1.0	1.9	1.8	3
C⁺(₂P) + HC₃N = C₃H⁺ + CN	0.8	6.1	5.6	4
= C₄N⁺ + H	0.2
C⁺ + CH₂CCH₂ = C₄H₂⁺ + H₂	0.4	1.4	1.88	1
= C₃H₃⁺ + CH	0.25
C⁺ + CH₂CCH₂ = C₄H₂⁺ + H₂	0.4	1.4	1.88	1
= C₃H₃M⁺ + CH	0.25
= C₂H₂⁺ + C₂H₂	0.2
= C₃H₄⁺ + C	0.15
C⁺ + CH₃C₂H = C₂H₃⁺ + C₂H₃	0.3	1.9	2.21	1
= C₃H₄⁺ + C	0.3
= C₃H₃⁺ + CH	0.2
= C₂H₂⁺ + C₂H₂	0.1
= C₂H₃⁺ + C₂H	0.1
C⁺ + CH₃CHCH₂ = C₂H₃⁺ + C₂H₃	0.3	2.0	2.03	1
= C₃H₅⁺ + CH	0.2
= C₃H₃⁺ + CH₃	0.15
= C₂H₂⁺ + C₂H₄	0.15
= C₃H₆⁺ + C	0.1
= C₄H₃⁺ + H₂ + H	0.1
C⁺ + C₃H₈ = C₂H₅⁺ + C₂H₃	0.35	1.9		1
= C₂H₃⁺ + C₂H₅	0.25
= C₂H₂⁺ + C₂H₆	0.2
= C₃H₃⁺ + CH₃ + H₂	0.2
C⁺ + C₄H₂ = C₅H⁺ + H	0.50	2.9	1.84	5
= C₄H₂⁺ + C	0.45
= C₃H⁺ + C₂H	0.05
C⁺ + C₆H₆ = C₆H₆⁺ + C	0.67	2.4	2.33	1
= C₅H₃⁺ + C₂H₃	0.17
= C₇H₅⁺ + H	0.10
= C₃H₃⁺ + C₄H₃	0.06
HCO⁺ + HC₃N = HC₃NH⁺ + CO	1.0	4.0	4.0	4
H₂CN⁺ + C₄H₂ = C₄H₃⁺ + HCN	1.00	1.4	1.3	5
CH₃⁺ + HC₃N = C₃H₃⁺ + HCN	0.6	4.2	5.1	4
= CH₃⁺HC₃N	0.4
CH₃⁺ + C₄H₂ = C₃H₃⁺ + C₂H₂	0.9	1.3	1.69	5
= C₅H₃⁺ + H₂	0.1
CH₃NO₂H⁺ + HC₃N = HC₃NH⁺ + CH₃NO₂	0.5	1.8	3.3	4
= H₄C₄N⁺ + HNO²	0.5
CH₃OH₂⁺ + C₄H₂ = CH₃OH₂ + C₄H₂	1.00	0.37	1.3	5
CN⁺ + CD₄ = CD₃⁺ + DCN	0.45	0.58	1.19	6
= CD₄⁺ + CN	0.20
= DCN⁺ + CD₃	0.20
= D₂CN⁺ + CD₂	0.10
= CD₂CD⁺ + D₂	0.05
CN⁺ + HCN = HCN⁺ + CN	0.85	2.1	3.82	6
= C₂N₂⁺ + H	0.15
CN⁺ + CH₄ = CH₃⁺ + HCN	0.50	0.90	1.19	6
= CH₄⁺ + CN	0.15
= HCN⁺ + CH₃	0.15
= H₂CN⁺ + CH₂	0.10
= CH₂CN⁺ + H₂	0.10
CN⁺ + CH₃OH = CH₃O⁺ + HCN	0.6	2.6	2.44	6
= CH₃OH⁺ + CN	0.3
= H₂CN + CH₂O	0.1
CN + CO(He) = CO⁺ + CN	0.95	0.25	0.93	6
= CN + CO	0.05
CN⁺ + CO₂ = CO₂⁺ + CN	0.4	0.75	0.94	6
= NCO⁺ + CO	0.3
= C²O⁺ + NO	0.3
CN⁺ + OCS = OCS⁺ + CN	0.80	1.5	1.47	6
= NCS⁺ + CO	0.15
= NC₂S⁺ + O	0.05
CN⁺ + C₂D₂ = C₂D₂⁺ + CN	0.7	0.54	1.19	6
= DC₃N⁺ + D	0.3
CN⁺ + CD₃CN = CD₃CN⁺ + CN	0.5	3.4	4.59	6
= CD₂CN⁺ + DCN	0.2
= CD₃⁺ + C₂N₂	0.2
= C₂D₃⁺ + CN₂	0.1
CN⁺ + C₂H₄ = C₂H₄⁺ + CN	0.7	1.0	1.37	6
= (H₂CN⁺ + C₂H₂)
= HCN⁺ + C₂H₃	0.25
= (C₂H₃⁺ + HCN)
= H₂C₃N⁺ + H₂	0.05
CN⁺ + C₂N₂ = C₂N₂⁺ + CN	0.85	1.4	1.3	3
= C₃N⁺ + N₂	0.10
= C₂N⁺ + CN₂	0.05
CN⁺ + HC₃N = HC₃N⁺ + CN	0.8	3.9	4.2	4
= C₃N⁺ + HCN	0.2
CN⁺ + C₄H₂ = C₄H₂⁺ + CN	0.75	0.97	1.39	5
= HC₅N⁺ + H	0.25
CN⁺ + D₂ = DNC⁺ + D	1.0	0.81	1.13	6
CN⁺ + D₂O = D₂O⁺ + CN	0.4	2.1	2.73	6
= DCN⁺ + OD	0.4
= DNCO⁺ + D	0.1
= D₂CN⁺ + O	0.1
= (DCO⁺ + ND)
CN⁺ + ND₃ = ND₃⁺ + CN	>0.8	1.3	2.44	6
= D₂CN⁺ + ND	0.1
= DCN⁺ + ND₂	0.1
= (ND₂⁺ + DCN)
CN⁺ + H₂ = HCN⁺ + H	1.0	1.0	1.56	6
CN⁺ + H₂S = H₂S⁺ + CN	0.4	1.30	1.70	6
= HS⁺ + HCN	0.3
= S⁺ + (H₂ + CN)	0.3
CN⁺ + NO = NO + CN	0.75	0.76	0.86	6
= NCO⁺ + N	0.25
CN⁺ + N₂(He) = CN + N₂	1.0	0.0043	0.84	6
CN⁺ + N₂O = N₂O⁺ + CN	0.6	0.76	1.03	6
= NCO⁺ + N₂	0.2
= NO⁺ + CN₂	0.2
CN⁺ + O₂ = O₂⁺ + CN	0.6	0.78	0.78	6
= NCO⁺ + O	0.2
= NO⁺ + CO	0.2
CN⁺ + Xe = Xe⁺ + CN	1.0	0.16	1.01	6
CN⁺ + HC₃N = HC₃N⁺ + CO	1.0	3.1	4.1	4
CO⁺ + HC₃N = HC₃N⁺ + CO	1.0	2.8	3.64	7
C₂⁺ + CO = C₃O⁺	1.0	0.0074	0.95	7
C₂⁺ + C₂N₂ = C₂N⁺ + C₂N	0.5	1.5	1.4	3
= C₃N⁺ + CN	0.3
= C₄⁺ + N₂	0.2
C₂⁺ + HC₃N = C₃N⁺ + C₂H	0.5	4.8	4.3	4
= C₅N⁺ + H	0.2
= C₃H⁺ + C₂N	0.2
= C₂N⁺ + C₃H	0.1
C₂H⁺ + HCN = C₂H₂⁺ + CN	0.5	2.8	3.60	7
= HCNH⁺ + C₂	0.5
C₂H⁺ + CO = C₃HO⁺	1.0	0.10	0.94	2
C₂H⁺ + HC₃N = HCNH⁺ + C₂	0.5	3.2	4.2	4
= C₄H₂⁺ + CN	0.2
= HC₅N⁺ + H	0.2
= HC₃N⁺ + C₂H	0.1
C₂H₂⁺ + HCN(He) = C₂H₂⁺ .HCN	0.87	0.39	3.56	7
= H₂C₂N⁺ + H	0.08
= HCNH⁺ + C₂H	0.05
C₂H₂⁺ + HC₂N = C₄H₂⁺ + CN	0.5	3.2	4.2	4
= C₂H₂ + HC₂N	0.5
C₂H₂⁺ + C₄H₂ = C₄H₂⁺ + C₂H₂	0.9	1.4	1.39	5
= C₆H₂⁺ + H	0.1
C₂H₂⁺ + HCN = HCNH⁺ + C₂H₂	1.0	2.9	3.53	7
C₂H₂⁺ + HC₂N = HC₂NH⁺ + C₂H₂	1.0	3.9	4.1	4
C₂H₄⁺ + HCN = C₂H₄⁺ .HCN	1.0	0.087	3.50	7
CH₂CNH⁺ + HC₂N = CH₂CNH⁺ .HC₂N	1.0	0.5	3.6	4
C₂H₅⁺ + HCN = HCNH⁺ + C₂H₄	1.0	2.7	3.47	7
C₂H₇⁺ + HCN = HCNH⁺ + C₂H₆	0.9	2.2	3.41	7
= CH₂CNH⁺ + CH₄	0.1
C₂N⁺ + N₂N₂(He) = C₂N⁺ .C₂N₂	1.0	0.15	1.2	3
C₂N⁺ + HC₂N = C₂H⁺ + C₂N₂	1.0	3.1	3.7	4
C₂N⁺ + C₄H₂ = C₅H⁺ + HCN	0.6	1.3	1.23	5
= C₄H₂⁺ + C₂N	0.2
= C₂N⁺ .C₄N₂	0.2
CNC⁺ + HCN = C₂HN₂⁺	1.0	0.29	3.5	8
CCN⁺ + HCN = C₂HN₂⁺	1.0	0.29	3.5	8
CNC⁺ + CH₄ = C₂H₃⁺ + CHN	0.7	0.0039	1.1	8
= C₃H₂N⁺ + H₂	0.2
= CH₂N⁺ + C₂H₂	0.1
CCN⁺ + CH₄ = products		0.35	1.1	8
CNC⁺ + CH₃OH = CH₃⁺ + C₂HNO	0.3	2.1	2.2	8
= C₂H₃O⁺ + CHN	0.3
= (CHNO⁺ + C₂H₃)
= CH₃O⁺ + C₂HN	0.1
= (HNO⁺ + C₃H₃)
= C₂H₂N⁺ + CH₂O	0.1
= C₃H₂N⁺ + H₂O	0.1
CCN⁺ + CH₃OH = products		2.1	2.2	8
CNC⁺ + CO = C₃NO⁺	1.0	< 0.0005	0.85	8
CCN⁺ + CO = C₃NO⁺	1.0	< 0.0005	0.85	8
CNC⁺ + CO₂		< 0.00003	0.84	8
CCN⁺ + CO₂ = C₂NO⁺ + CO	0.8	1.0	0.84	8
= C₃O⁺ + NO	0.2
CNC⁺ + OCS = C₂NS⁺ + CO	1	0.95	1.3	8
CCN⁺ + OCS = C₂NS⁺ + CO	1	0.95	1.3	8
CCN⁺ + OS₂ = C₂NS⁺ + CS	1.0	0.95	1.3	8
CCN⁺ + CS₂ = products		0.95	1.3	8
CNC⁺ +C₂H₂ = C₃H⁺ + CHN	0.8	1.0	1.1	8
= CH₂N⁺ + C₃	0.2
CCN⁺ + C₂H₂ = C₃H⁺ + CHN	0.8	1.0	1.1	8
= CH₂N⁺ + C₃	0.2
CNC⁺ + CH₃CN = C₂H₃⁺ + C₂N₂	1	3.1	4.1	8
CCN⁺ + CH₃CN = C₂H₃⁺ + C₂N₂	0.9	3.1	4.1	8
= C₂N₂H⁺ + C₂H₂	0.1
CNC⁺ + C₂H₄ = C₃H₃⁺ + CHN	0.5	1.0	1.2	8
= C₂H₂N⁺ + C₂H₂	0.25
= C₄H₂N⁺ + H₂	0.15
CCN⁺ + C₂H₄ = products		1.0	1.2	8
CNC⁺ + C₂N₂ = C₄N₃⁺	1.0	0.15	1.1	8
CCN⁺ + C₂N₂ = C₄N₃⁺	1.0	0.15	1.1	8
CNC⁺ + H₂ =		<0.0001	1.5	8
CCN⁺ +H₂ = CH₂N⁺ + C	0.95	0.3	1.5	8
= C₂H₂N⁺	0.05
CNC⁺ + H₂O = CHO⁺ + CHN	0.7	0.11	2.6	8
= CH₂N⁺ + CO	0.3
CCN⁺ + H₂O = CHO⁺ + CHN	0.5	1.0	2.6	8
= C₂NO⁺ + H₂	0.3
= CH₂N⁺ + CO	0.2
CNC⁺ + H₂S = CHS⁺ + CHN	0.95	1.2	1.5	8
= C₂NS⁺ + H₂	0.05
CCN⁺ + H₂S = products		1.2	1.5	8
CNC⁺ + NH₃ = CH₂N⁺ + CHN	1	1.8	2.3	8
CCN⁺ + NH₃ = products		1.8	2.3	8
CNC⁺ + NO = NO⁺ + C₂N	1.0	0.62	0.79	8
CCN⁺ + NO = NO⁺ + C₂N	1.0	0.62	0.79	8
CNC⁺ + N₂ = C₂N₃⁺	1.0	< 0.0001	0.77	8
CCN⁺ + N₂ = C₂N₃⁺	1.0	< 0.0001	0.77	8
CNC⁺ + N₂O = C₂NO⁺ + N₂	0.9	0.53	0.93	8
= (CN₃⁺ + CO)
= NO⁺ + C₂N₂	0.1
CCN⁺ + N₂O = C₂NO⁺ + N₂	0.9	0.53	0.93	8
= (CN₃⁺ + CO)
= NO⁺ + C₂N₂	0.1
CNC⁺ + O₂ =		< 0.0001	0.71	8
CCN⁺ + O₂ = C₂NO⁺ + O	1.0	0.3	0.71	8
CNC⁺ + Xe =		< 0.0005	0.87	8
CCN⁺ + Xe = Xe⁺ + C₂N	1.0	0.03	0.87	8
C₂N⁺ .C₄H₂ + C₄H₂ = C₂N⁺ .(C₄H₂)₂	1.0	~ 1	1.02	5
C₂N₂⁺ + C₂N₂(He) = C₂N₂⁺ .C₂N₂	1.0	0.49	1.1	3
C₂N₂⁺ + HC₃N = HC₃N⁺ +C₂N₂	1.0	1.6	3.4	4
C₂N₂⁺ + C₄H₂ = C₄H₂⁺ + C₂N₂	0.9	1.2	1.14	5
= HC₅N⁺ + HCN	0.1
C₂O⁺ + CO = C₃O₂⁺	1.0	0.02	0.84	2
C₃⁺ + CO = C₄O⁺	1.0	0.02	0.86	2
C₃H⁺ + HCN(He) = C₄H₂N⁺	1.0	1.0	3.52	9
C₃H⁺ + CH₃OH = HC₃O⁺ + CH₄	0.8	2.2	2.23	9
= CH₃O⁺ + C₃H₂	0.1
= CH₃⁺ + H₂C₃O	0.1
C₃H⁺ + CH₄ = C₂H₃⁺ + C₂H₂	0.7	0.55	1.12	9
= C₃H₃⁺ + CH₂	0.2
= C₄H₃⁺ + H₂	0.1
C₃H⁺ + CO(He) = HC₄O⁺	1.0	2.9(-27)	0.86	9
C₃H⁺ + CO = C₄HO⁺	1.0	0.032	0.86	2
C₃H⁺ + CO₂ = HC₃O⁺ + CO	1.0	0.002	0.85	9
C₃H⁺ + COS = CS⁺ + HC₃O	0.7	0.61	1.31	9
= HC₃O⁺ + CS	0.2
= HC₃S + CO	0.1
C₃H⁺ + C₂D₂(He) = C₅HD₂⁺	0.7	0.93	1.09	9
= C₅HD⁺ + D	0.3
C₃H⁺ + CD₃CN = C₃NHD⁺ + C₂D₂	0.3	3.0	4.15	9
= C₃H⁺ .CD₃CN	0.3
= C₂D₃⁺ + HC₃N	0.15
= CD₃CNH⁺ + C₃	0.15
= C₂ND₂⁺ + C₂D₂	0.1
C₃H⁺ + C₂H₂(He) = C₅H₃⁺	0.7	1.0	1.09	9
= C₅H₂⁺ + H	0.3
C₃H⁺ + CH₃CN = C₃NH₂⁺ + C₂H₂	0.35	3.0	4.15	9
= C₃H⁺ .CH₃CN	0.3
= C₂H₃⁺ + HC₃N	0.2
= CH₃CNH⁺ + C₃	0.15
C₃H⁺ + C₂H₄ = C₃H₃⁺ + C₂H₂	0.95	0.95	1.21	9
= C₅H₃⁺ + H₂	0.05
C₃H⁺ + C₂N₂(He) = C₅HN⁺	1.0	< 0.44	1.13	9
C₃H⁺ + C₄H₂ = C₅H₂⁺ + C₂H	1.0	1	3.3	9
= C₅H⁺ + C₂H₂	0.85	1.2	1.24	5
= C₄H₂⁺ + C₃H	0.10
= C₃H⁺ + D₂(He) = C₃HD₂⁺	0.05
C₃H⁺ + D₂(He) = C₃HD₂⁺	1.0	7.7 (-28)	1.12	9
C₃H⁺ + ND₃ = ND₃H⁺ + C₃	0.5	1.7	2.29	9
= D₂CN⁺ + C₂HD	0.2
= ND₃⁺ + C₃H	0.2
= HC₃ND₂⁺ + D	0.1
C₃H⁺ + H₂(He) = C₃H₃⁺	1.0	1.9(-27)	1.54	9
C₃H⁺ + H₂O = CHO⁺ + C₂H₂	0.55	0.45	2.56	9
= C₂H₃⁺ + CO	0.40
= HC₃O⁺ + H₂	0.05
C₃H⁺ + H₂S = CHS⁺ + C₂H₂	0.63	1.2	1.55	9
= C₂H₃⁺ + CS	0.30
= HC₃S⁺ + H₂	0.07
C₃H⁺ + NH₃ = NH₄⁺ + C₃	0.5	1.6	2.29	9
= H₂CN⁺ + C₂H₂	0.3
= NH₃⁺ + C₃H	0.15
= HC₃NH₂⁺ + H	0.05
C₃H⁺ + NO = HC₂N⁺ + CO	0.75	0.55	0.79	9
= NO⁺ + C₃H	0.25
C₃H⁺ + N₂ =		< 0.0001	0.77	9
C₃H⁺ + N₂O = NO⁺ + HC₃N	0.55		0.93	9
= HC₃O⁺ + N₂	0.4
= HCN⁺ + C₂NO	0.05
C₃H⁺ + O₂ = HCO⁺ + C²O	0.6	0.025	0.72	9
= HC₃O⁺ + O	0.3
= HC²O⁺ + CO	0.1
HC₃N⁺ + HCN = (HC₃N) + .HCN	1.0	0.89	3.3	10
HC₃N⁺ + CH₄ = C₂H₃N⁺ + C₂H₂	0.5	0.59	1.1	10
= C₃H₂N⁺ + CH₃	0.3
= C₃H₄⁺ + HCN	0.1
HC₃N⁺ + CO = (HC₃N)⁺CO	1.0	0.034	0.80	10
HC₃N⁺ + OCS = (OCS)⁺ + HC₃N	0.8	0.72	1.2	10
= (HC₃NS)⁺ + CO	0.2
HC₃N⁺ + C₂H₂ = C₄H₂⁺ + HCN	0.8	0.64	1.0	10
= C₂H₂⁺ + HC₃N	0.2
HC₃N⁺ + C₂H₄ = C₂H₄⁺ + HC₃N	0.8	0.67	1.1	10
= H₂C₃N⁺ + C₂H₃	0.2
HC₃N⁺ +HC₃N = (HC₃N)⁺HC₃N	1.0	1.2	3.4	10
HC₃N⁺ + C₄H₂ = C₄H₂⁺ + HC₃N	1.0	0.89	1.1	10
HC₃N⁺ + H₂ = C₂H₂ + HCN	0.5	0.0019	1.5	10
= H₂C₃N⁺ + H	0.5
HC₃N⁺ + H₂O = H₂C₃N⁺ + HO	1.0	0.67	2.4	10
HC₃N⁺ + O₂ = HCO⁺ + (C₂NO)	0.4	0.0025	0.67	10
C₃HO⁺ + CO =		< 0.0002	0.80	2
C₃H₃⁺ + C₄H₂ = C₃H₃⁺ .C₄H₂	1.0	~ 1	1.23	5
C₃H₃⁺ .C₄H₂ + C₄H₂ = C₃H₃⁺ .(C₄H₂)₂	1.0	~ 1	1.01	5
(CH₃)₂COH⁺ + HC₃N = (CH₃)₂COH⁺ .HC₃N	1.0	0.05	3.3	2
i-C₃H₇O₂⁺ + HC₃N = I-C₃H₇OH₂⁺ .HC₃N	1.0	0.6	3.3	4
C₃O⁺ + CO = C₄O₂⁺	1.0	0.04	0.80	2
C₃O₂⁺ +CO =		< 0.0005	0.80	2
C₄⁺ + CO = C₅O⁺	1.0	0.29	0.81	2
C₄H⁺ + CO = C₅O⁺	1.0	0.25	0.81	2
C₄HO⁺ + CO =		< 0.0002	0.77	2
C₄H₂⁺ + CO = C₄H₂⁺ .CO	0.5	0.019	0.81	5
= HC₅O⁺ + H	0.5
C₄H₂⁺ + C₂H₂ = C₄H₂⁺ C₂H₂	1.0	0.84	1.03	5
C₄H₂⁺ + C₂N₂ = C₄H₂⁺ .C₂N₂	0.98	0.043	1.14	5
= HC₅N⁺ +HCN	0.02
C₄H₂⁺ + C₄H₂ = C₄H₂⁺ .C₄H₂	0.9	1.3	1.15	5
= C₆H₂⁺ + C₂H₂	0.1
C₄H₂⁺ + H₂ =		< 0.0005	1.53	5
C₄H₂⁺ .C₄H₂ + C₄H₂ = C₄H₂⁺ .(C₄H₂)₂	1.0	~ 1	0.99	5
C₄H₃⁺ + C₄H₂ = C₄H₃⁺ .C₄H₂	0.9	~ 1	1.14	5
= C₆H₃⁺ + C₂H₂	0.1
C₄N⁺ + HCN = C₅HN₂⁺	1.0	0.84	2.2	11
C₄N⁺ + CH₄ = C₃H₂N⁺ + C₂H₂	0.35	0.57	1.05	11
= C₄H₃⁺ + CHN	0.30
= C₂H₃⁺ + C₃HN	0.25
= CH₂N⁺ + C₄H₂	0.05
= C₅H₂N⁺ + H₂	0.05
C₄N⁺ + CO = C₅NO⁺	1.0	0.093	0.78	11
C₄N⁺ + C₂H₂ = C₅H⁺ + CHN	> 0.7	0.80	1.0	11
= C₆H₂N⁺	< 0.3
C₄N⁺ + CH₃CN = C₂H₃⁺ + C₄N₂	0.6	3.1	3.7	11
= C₄HN₂⁺ + C₂H₂	0.4
C₄N⁺ + HC₃N = C7HN₂⁺	1.0	1	3.3	11
C₄N⁺ + HC₃N = C₄N⁺HC₃N	1.0	1	3.3	4
C₄N⁺ + C₄H₂ = C8H₂N⁺	0.6	1.6	1.1	11
= C7H⁺ + CHN	0.4
C₄N⁺ + ND₃ = ND₃⁺ + C₄N	0.65	1.2		11
= C₃D₂N⁺ + CDN	0.20
= CD₂N⁺ + C₃DN	0.15
C₄N⁺ + H₂ = C₃H⁺ + CHN	1.0	0.022	1.5	11
C₄N⁺ + H₂O = C₃H₂N⁺ + CO	0.5	1.5	2.4	11
= CHO⁺ + C₃HN	0.4
= C₄H₂NO⁺	0.1
C₄N⁺ + H₂S = CHS⁺ + C₃HN	0.60	0.89	1.4	11
= C₂NS⁺ + C₂H₂	0.25
= C₃H₅⁺ + CHN	0.10
= C₄H₂NS⁺	0.05
C₄O⁺ + CO = C₅O₂⁺	1.0	0.3	0.77	2
C₄O₂⁺ + CO =		< 0.0002	0.75	2
C₅H⁺ + CO = HC₅O⁺	1.0	0.1	0.78	12
C₅H⁺ + C₂H₂ = C7H₃⁺	1.0	0.58	1.00	12
C₅H⁺ + C₄H₂ = C₅H⁺ .C₄H₂	1.0	~ 1	1.09	5
C₅H⁺ + H₂ =		< 0.0001	1.52	12
HC₅N⁺ + C₄H₂ = HC₅N⁺ .C₄H₂	1.0	~ 1	1.05	5
C₅⁺ + CO = C₅O⁺	1.0	0.8	0.78	2
C₅H⁺ + CO = C₅HO⁺	1.0	0.1	0.78	2
C₅HO⁺ + CO =		< 0.0002	0.75	2
C₅H₂⁺ + C₄H₂ = C₅H₂⁺ .C₄H₂	0.4	~ 1	1.09	5
= C7H₃⁺ + C₂H	0.6
C₅H₃⁺ + C₄H₂ = C₅H₃⁺ .C₄H₂	1.0	~ 1	1.09	5
C₅O⁺ + CO = C₅O₂⁺	1.0	0.1	0.75	2
C₅O₂⁺ + CO =		< 0.0002	0.74	2
C₅⁺ + CO = C7O⁺	1.0	0.2	0.76	2
C₆HO⁺ + CO =		< 0.0002	0.74	2
C₆H₂⁺ + C₄H₂ = C₆H₂⁺ .C₄H₂	1.0	~ 1	1.05	5
C₆H₃⁺ + C₄H₂ = C₆H₃⁺ .C₄H₂	1.0	~ 1	1.05	5
C₆O⁺ + CO = C7O₂⁺	1.0	0.13	0.74	2
C₆O₂⁺ + CO =		< 0.0006	0.73	2
C7O₂⁺ + CO =		< 0.0002	0.72	2
N₂H⁺ + HC₃N = HC₃NH⁺ + N₂	1.0	4.2	4.0	4
N₂H⁺ + C₄H₂ = C₄H₃⁺ + N₂	1.0	1.1	1.3	5
H₃⁺ + HC₃N = HC₃NH⁺ + H₂	1.0	10.5	10.3	4
H₃⁺ + C₄H₂ = C₄H₃⁺ + H₂	1.0	2.6	3.4	5
H₃O⁺ + HC₃N = HC₃NH⁺ + H₂O	1.0	3.8	4.7	4
H₃O⁺ + C₄H₂ = C₄H₃⁺ + H₂O	1.0	1.1	1.5	5
He⁺ + C₂N₂ = products		1.6	2.72	13
He⁺ + HC₃N = C₂⁺, C₃⁺, C₂H⁺		6.9	9.0	4
N⁺ + C₂N₂ = C₂N⁺ + N₂	0.7	1.4	1.7	3
= C₂N₂⁺ + N	.03
N₂⁺ + C₂N₂ = C₂N₂⁺ + N₂	> 0.95	0.86	1.3	3
= N₃⁺ + CN₂	< 0.05
= (CN₂⁺ + N₃)
N₂⁺ + HC₃N = HC₃N⁺ + N₂	1.0	4.1	4.1	4
Xe⁺(^2p ½) + C₂N₂ = C₂N₂⁺ + Xe	1.0	0.65	0.86	13
Xe⁺(^2p 3/2) + C₂N₂ = Xe⁺(^2p 3/2)C₂N₂	1.0	0.004	0.86	13

References [1] Reactions of 12C⁺ with Hydrocarbons at 296 K: Carbon-Carbon Formation.
D.K. Bohme, A.B. Raksit and H.I. Schiff, Chem. Phys. Letters 93, 592-597 (1982).

[2] Laboratory Measurements of Gas-Phase Reactions of Polyatomic Carbon Ions, C_n⁺(n=1-6) and C_nH⁺ (n=2-5) with Carbon Monoxide.
D.K. Bohme, S. Wlodek, L. Williams, L. Forte and A. Fox, J. Chem. Phys., submitted July, 1987.

[3] Flow Tube Studies of Reactions of Cyanogen with Ions Selected from Cyanogen.
A.B. Raksit, D.K. Bohme, Intern. J. of Mass Spectrom. And Ion Processes 63, 217-229(1985).

[4] Flow Tube Studies of Reactions of Selected Ions with Cyanoacetylene.
A.B. Raksit, D.K. Bohme, Can. J. Chem. 63, 854-861(1985).

[5] Ion-Molecule Reactions with Carbon Chain Molecules: Reactions with Diacetylene and the Diacetylene Cation.
S. Dheandhanoo, L. Forte, A. Fox and D.K. Bohme, can. J. Chem. 64, 641-648(1986).

[6] A Selected Ion Flow Tube Study of CN⁺ Reactions at 296 ± 2K.
A.B. Raksit, H.I. Schiff and D.K. Bohme, Intern. J. Mass Spectrom. Ion Processes, 56, 321-325(1984).

[7] Studies of Reactions Involving C₂H_X⁺ Ions with a Modified Selected Ion Flow Tube.
G.I. Mackay, G.D. Vlachos, D.K. Bohme and H.I. Schiff, Intern. J. Mass Spectrom.Ion Phys.36, 259-270(1980).

[8] Selected-Ion Flow Tube Studies of C₂N⁺ Ions Derived from Cyanogen by Electron Ionization.
D.K. Bohme, S. Wlodek, A. Raksit, H.I. Schiff, G.I. Mackay, and K.J. Keskinen, Intern. J. Mass Spectrom. Ion Processes, accepted July, 1987.

[9] Studies of Reactions of C₃H⁺ Ions in the Gas Phase at 296 ± 2K.
A.B. Raksit, D.K. Bohme, Intern. J. Mass Spectrom. Ion Processes 55, 69-82 (1983/1984).

[10] Selected-Ion Flow Tube Studies of the Radical Cation (HC₃N)⁺. In the Interstellar Synthesis of Cyanoacetylene.
A.Fox, A.B. Raksit, S.Dheandhanoo and D.K. Bohme, Can, J. Chem. 64, 399-403(1986).

[11] Selected Ion Flow Tube Studies of Reactions of the Carbene Cation: C₄N⁺ and their Implications for Interstellar Gas Cloud Chemistry.
D.K. Bohme, S. Wlodek and A.B. Raksit, Can. J. Chem., in press, July 1987.

[12] Experimental Studies of the Kinetics Between Neutrals Molecules and Carbene Cations.
D.K. Bohme, S. Dheandhanoo, S. Wlodek and A.B. Raksit, J. Phys. Chem. 91, 2569-2572(1987).

[13] Studies of the Initial Steps in the Polymerization of C₂N₂ induced by Xe⁺.
A.B. Raksit, D.K. Bohme, Can. J. Chem.62, 2123-2126(1984).