NMR evidence for free rotation of coordinated tetracyanothylene in its square pyramidal adducts with tetrakis(arylisocyanide)rhodium(I) perchlorates

Nuclear magnetic resonance spectrometry

“…Calculations of the shielding effect of a freely rotating magnetically anisotropic group (1100) and chemical shifts in hydrocarbons (1101) have been presented. Cross-ring couplings for stereochemical assignments for four-membered rings (1102), conformation determination in paramagnetic metal complexes (1103), free rotation of coordinated tetracyanoethylene (1104), hindered rotation of coordinated phosphorus trifluoride (1105), torsional barriers in ferrocenylcarbonium ions (1106), conformations of alcohol derivatives of tricarbonyl (diene) iron compounds (1107), temperature dependence of diastereotopic methylene protons and methyl groups in 2isopropyl -1 -(dimethyaminomethyl)ferrocene (1108), wideline NMR studies of fluxional organometallic molecules in the solid state (1109) , molecular motion in solid trimethylaminegallane (1110) , conformational studies of bridging carboxylate complexes of palladium(II) and platinum(II) (1111), conformational effects in platinum complexes of methylglycines (1112), and studies of rotational isomers of 2-furanaldehyde (1113) have been reported. Keto-enol tautomerism (1114), tautomerism of nitrogen containing cyclic and acyclic compounds (1115), and geometrical isomerism of /3-diketonate complexes (1116) have been the subjects of extensive reviews.…”