Swinging of the bent nitrosyl ligand in (nitrosyl- 15N)(meso-tetraphenylporphinato)cobalt: a solid-state motion detected by nitrogen-15 CPMAS NMR spectroscopy

Not Limited to Iron: A Cobalt Heme–NO Model Facilitates N–N Coupling with External NO in the Presence of a Lewis Acid to Generate N2O

“…The analogous reaction with labeled 15 NO (in excess), however, reveals that an NO exchange reaction occurs [Eq. and Supporting Information, Figure S1], similar to that previously observed with the Fe analogue, to give (OEP)Co( 15 NO) (υ NO 1645 cm −1 (KBr), Δυ NO −30 cm −1 ; Supporting Information, Figure S1) …”

Not Limited to Iron: A Cobalt Heme–NO Model Facilitates N–N Coupling with External NO in the Presence of a Lewis Acid to Generate N2O

“…The analogous reaction with labeled 15 NO (in excess), however, reveals that an NO exchange reaction occurs [Eq. and Supporting Information, Figure S1], similar to that previously observed with the Fe analogue, to give (OEP)Co( 15 NO) (υ NO 1645 cm −1 (KBr), Δυ NO −30 cm −1 ; Supporting Information, Figure S1) …”

“…that previously observed with the Fe analogue, [14] to give (OEP)Co( 15 NO) (u NO 1645 cm À1 (KBr), Du NO À30 cm À1 ; Supporting Information, Figure S1). [18] We then examined the effect of the Lewis acid on the Co-NO moiety in the absence of added NO.A ddition of approximately 2equiv of BF 3 ·OEt 2 to (OEP)Co(NO) in CH 2 Cl 2 (u NO 1672 cm À1 )a tÀ45 8 8Cf or 30 min resulted in the appearance of anew low-intensity band in the IR spectrum at 1632 cm À1 (i.e., Du NO À40 cm À1 ;c alcd Du NO À28 cm À1 ,s ee later) in addition to the starting 1672 cm À1 band;t his new band shifted to 1607 cm À1 when (OEP)Co( 15 NO) (u15 NO 1641 cm À1 )w as used in the reaction (Figure 1, right). We assign this new band at 1632 cm À1 to the u NO of the (OEP)Co(NO·BF 3 )a dduct.…”

Visualizing tilted binding and precession of diatomic NO adsorbed to Co-porphyrin on Au(111) using scanning tunneling microscopy

“…In addition, based on nuclear magnetic resonance (NMR) experiments, it was argued that the NO was not only tilted and but also swings or spins with nite thermal excitation. 29 In contrast to these observations, recent scanning tunneling microscopy (STM) experiments show no direct indication of a tilted binding, mostly showing center-protrusion images in NO-CoTPP on Ag(111). [30][31][32] In the STM experiments, a CoTPP monolayer was prepared and exposed to NO gas in a vacuum condition, different from bulk crystals reacted in solution phases.…”