Table 1. Species detected in ESI(+)-MS for the reaction of RhCl(PPh₃)₃ with 53. Adapted from ref. 109 .

Species	Cycle	Identity	m/z	Intensity before H2 addition	Intensity after H2 addition	Intensity after cyclohexene addition
Free ligand		53 +	517.2	13	13	4
RhClP2	B	[RhCl(53 +)2]2	586.2	11	3	<1
	B	[RhCl(PPh3)(53 +)]	917.2	24	100	6
RhP3 +		[Rh(PPh3)3]+	889.2	15	8	30
RhClP3	A	[RhCl(PPh3)(53 +)2]	717.2	16	9	<1
	F	[RhCl(PPh3)(53 +)2H2]	718.2	—	3	<1
	A	[RhCl(PPh3)2(53 +)]	1179.3	100	10	100
	F	[RhCl(PPh3)2(53 +)H2]	1181.3	—	77	<1
	A	[RhCl(PPh3)(53 +)2 BF4]	1521.4	4	<1	2
	F	[RhCl(PPh3)(53 +)2H2 BF4]	1523.4	—	2	<1
Rh2Cl2P4	H	[Rh2Cl2(PPh3)3(53 +)]	1581.2	6	2	3
	I	[Rh2Cl2(PPh3)3(53 +)H2]	1583.2	—	2	<1
	J	[Rh2Cl2(PPh3)3(53 +)H4]	1585.2	—	<1	<1