Table 3: Derived reaction rates for reactions R₃ and R₄ normalized to $r_{\rm h}=1$ AU by $r_{\rm h}^{-2}$ .
Date R₃ [10^-7 s^-1] R₄ [10^-7 s^-1]

23.11.1997 $9.5 \pm 2.4$ $195. \pm 15.$

6.12.1997 $15.4 \pm 5.1$ $202. \pm 22.$

19.12.1997 $9.4 \pm 0.5$ $200. \pm 12.$

20.1.1998 $9.6 \pm 3.2$ $202. \pm 20.$

21.1.1998 $9.6 \pm 6.1$ $199. \pm 13.4$

21.3.1998 $9.4 \pm 3.1$ $188. \pm 20.0$

17.8.1996 $15.6 \pm 4.1$ $143. \pm 45.0$

2.10.1996 $8.9 \pm 3.2$ $201. \pm 15.0$

**Table 3:** Derived reaction rates for reactions R₃ and R₄ normalized to $r_{\rm h}=1$ AU by $r_{\rm h}^{-2}$ .
Date	R₃ [10^-7 s^-1]	R₄ [10^-7 s^-1]
23.11.1997	$9.5 \pm 2.4$	$195. \pm 15.$
6.12.1997	$15.4 \pm 5.1$	$202. \pm 22.$
19.12.1997	$9.4 \pm 0.5$	$200. \pm 12.$
20.1.1998	$9.6 \pm 3.2$	$202. \pm 20.$
21.1.1998	$9.6 \pm 6.1$	$199. \pm 13.4$
21.3.1998	$9.4 \pm 3.1$	$188. \pm 20.0$
17.8.1996	$15.6 \pm 4.1$	$143. \pm 45.0$
2.10.1996	$8.9 \pm 3.2$	$201. \pm 15.0$

Source LaTeX | All tables | In the text

	1 Introduction
	2 The coma chemistry model
	3 Coma profiles used for the analysis
	4 The chemistry of possible C₂ and C₃ parents
	5 The main chemical reaction network for the formation of C₂ and C₃
	6 Model input: the nucleus - properties and composition
	7 Deriving the production rates
	8 Production rates for C₂H₂, C₂H₆ and C₃H₄
	9 Error discussion
	10 Abundance ratios relative to water and carbon monoxide
	11 Abundance ratios relative to acetylene
	12 Clues on the formation region of comet Hale-Bopp
	13 Summary
	References
	Online Material