More Like this

1. Redox Studies of the Scandium Metallocene (C ₅ H ₂ ^t Bu ₃ ) ₂ Sc ^II Lead to a Terminal Side-On (N═N) ^2– Complex: [(C ₅ H ₂ ^t Bu ₃ ) ₂ Sc ^III (η ² -N ₂ )] ⁻

   https://doi.org/10.1021/jacs.5c00607  

   Queen, Joshua D; Rajabi, Ahmadreza; Ziller, Joseph W; Furche, Filipp; Evans, William J (April 2025, Journal of the American Chemical Society)
2. Solid-State End-On to Side-On Isomerization of (N═N) ^2– in {[(R ₂ N) ₃ Nd] ₂ N ₂ } ^2– (R = SiMe ₃ ) Connects In Situ Ln ^III (NR ₂ ) ₃ /K and Isolated [Ln ^II (NR ₂ ) ₃ ] ^1– Dinitrogen Reduction

   https://doi.org/10.1021/jacs.2c06716  

   Chung, Amanda B.; Rappoport, Dmitrij; Ziller, Joseph W.; Cramer, Roger E.; Furche, Filipp; Evans, William J. (September 2022, Journal of the American Chemical Society)
3. Dinitrogen reduction chemistry with scandium provides a complex with two side-on (NN) ²⁻ ligands bound to one metal: (C ₅ Me ₅ )Sc[(µ-η ² :η ² -N ₂ )Sc(C ₅ Me ₅ ) ₂ ] ₂

   https://doi.org/10.1039/d4sc03977g  

   Queen, Joshua D; Rajabi, Ahmadreza; Goudzwaard, Quinn E; Yuan, Qiong; Nguyen, Dang Khoa; Ziller, Joseph W; Furche, Filipp; Xi, Zhenfeng; Evans, William J (January 2024, Chemical Science)

   Although there are few reduced dinitrogen complexes of scandium, this metal has revealed a new structural type in reductive dinitrogen chemistry by reduction of bis(pentamethylcyclopentadienyl) scandium halides under N2. 

   more » « less
4. Comparison of two Mn ^IV Mn ^IV -bis-μ-oxo complexes {[Mn ^IV (N ₄ (6-Me-DPEN))] ₂ (μ-O) ₂ } ²⁺ and {[Mn ^IV (N ₄ (6-Me-DPPN))] ₂ (μ-O) ₂ } ²⁺

   https://doi.org/10.1107/S2056989020004557  

   Coggins, Michael K.; Downing, Alexandra N.; Kaminsky, Werner; Kovacs, Julie A. (July 2020, Acta Crystallographica Section E Crystallographic Communications)

   null (Ed.)

   The addition of tert -butyl hydroperoxide ( t BuOOH) to two structurally related Mn II complexes containing N,N -bis(6-methyl-2-pyridylmethyl)ethane-1,2-diamine (6-Me-DPEN) and N,N -bis(6-methyl-2-pyridylmethyl)propane-1,2-diamine (6-Me-DPPN) results in the formation of high-valent bis-oxo complexes, namely di-μ-oxido-bis{[ N , N -bis(6-methyl-2-pyridylmethyl)ethane-1,2-diamine]manganese(II)}( Mn — Mn ) bis(tetraphenylborate) dihydrate, [Mn(C 16 H 22 N 4 ) 2 O 2 ](C 24 H 20 B) 2 ·2H 2 O or {[Mn IV (N 4 (6-Me-DPEN))] 2 ( μ -O) 2 }(2BPh 4 )(2H 2 O) ( 1 ) and di-μ-oxido-bis{[ N , N -bis(6-methyl-2-pyridylmethyl)propane-1,3-diamine]manganese(II)}( Mn — Mn ) bis(tetraphenylborate) diethyl ether disolvate, [Mn(C 17 H 24 N 4 ) 2 O 2 ](C 24 H 20 B) 2 ·2C 4 H 10 O or {[Mn IV (N 4 (6-MeDPPN))] 2 ( μ -O) 2 }(2BPh 4 )(2Et 2 O) ( 2 ). Complexes 1 and 2 both contain the `diamond core' motif found previously in a number of iron, copper, and manganese high-valent bis-oxo compounds. The flexibility in the propyl linker in the ligand scaffold of 2 , as compared to that of the ethyl linker in 1 , results in more elongated Mn—N bonds, as one would expect. The Mn—Mn distances and Mn—O bond lengths support an Mn IV oxidation state assignment for the Mn ions in both 1 and 2 . The angles around the Mn centers are consistent with the local pseudo-octahedral geometry. 

   more » « less
5. Formation of the End-on Bound Lanthanide Dinitrogen Complexes [(R ₂ N) ₃ Ln–N═N–Ln(NR ₂ ) ₃ ] ^2– from Divalent [(R ₂ N) ₃ Ln] ^1– Salts (R = SiMe ₃ )

   https://doi.org/10.1021/jacs.0c01021  

   Ryan, Austin J.; Balasubramani, Sree ganesh; Ziller, Joseph W.; Furche, Filipp; Evans, William J. (May 2020, Journal of the American Chemical Society)

   null (Ed.)