in chloroform-d1 complex dissolved in CDCl3, degassed, H2 added at -196°C, sealed,warmed to room temp., monitored by NMR for days; not isolated;

in chloroform-d1 complex dissolved in CDCl3, degassed, H2 added at -196°C, sealed,warmed to room temp., monitored by NMR for days; not isolated;