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Table 3

Selection of elements and chemical (gas+ice) species in the small network.

12 elements H, He, C, N, O, Ne, Na, Mg, Si, S, Ar, Fe

(H) H, H+, H, H2, H, H, H 7
(He) He, He+, 2
(C–H) C, C+, C++, CH, CH+, CH2, CH, CH3, CH, CH4, CH, CH, 12
(C–N) CN, CN+, HCN, HCN+, HCNH+ 5
(C–O) CO, CO+, HCO, HCO+, CO2, CO, HCO, 7
(N–H) N, N+, N++, NH, NH+, NH2, NH, NH3, NH, NH 9
(N–N) N2, N, HN, 3
(N–O) NO, NO+, 2
(O–H) O, O+, O++, OH, OH+, H2O, H2O+, H3O+, 8
(O–O) O2, O, 2
(O–S) SO, SO+, SO2, SO, HSO 5
(S–H) S, S+, S++, 3
(Si–H) Si, Si+, Si++, SiH, SiH+, SiH, 6
(Si–O) SiO, SiO+, SiOH+, 3
(Na) Na, Na+, Na++, 3
(Mg) Mg, Mg+, Mg++, 3
(Fe) Fe, Fe+, Fe++, 3
(Ne) Ne, Ne+, Ne++, 3
(Ar) Ar, Ar+, Ar++, 3
ice CO#, H2O#, CO2#, CH4#, NH3#, SiO#, SO2#, O2#, HCN#, N2# 10

species total 100

Notes. Neutral more stable molecules are indicated in bold font and ices are indicated by a trailing #.

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