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1. Investigation of Pb–B Bonding in PbB 2 (BO) n − ( n = 0–2): Transformation from Aromatic PbB 2 − to Pb[B 2 (BO) 2 ] −/0 Complexes with BB Triple Bonds

   https://doi.org/10.1039/D3CP02800C  

   Chen, Qiang ; Chen, Wei-Jia ; Wu, Xin-Yao ; Chen, Teng-Teng ; Yuan, Rui-Nan ; Lu, Hai-Gang ; Yuan, Dao-Fu ; Li, Si-Dian ; Wang, Lai-Sheng ( February 2024 , Physical Chemistry Chemical Physics)

   Joint photoelectron spectroscopy and first-principles theory investigations indicate that the Pb-doped PbB₂(BO)_n⁻clusters (n= 0−2) undergo a transformation from σ + π doubly aromatic triangle PbB₂⁻to PbB₄(BO)₂^−/0complexes with a B≡B triple bond.

    

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2. Experimental and theoretical evidence of attractive interactions between dianions: [PdCl 4 ] 2− ⋯[PdCl 4 ] 2−

   https://doi.org/10.1039/D1CC05640A  

   Zierkiewicz, Wiktor ; Michalczyk, Mariusz ; Maris, Thierry ; Wysokiński, Rafał ; Scheiner, Steve ( December 2021 , Chemical Communications)

   Inspection of the arrangement of tetrachloridopalladate( ii ) centers in a crystalline solid places the Cl of one [PdCl 4 ] 2− directly above the Pd center of its neighbor. A survey of the CSD provides 22 more examples of such MX 4 2− ⋯MX 4 2− complexes, with M being a Group 10 metal and X = Cl, Br, or I. Quantum calculations attribute this arrangement to a π-hole bond wherein Cl lone pairs of one unit transfer charge to vacant orbitals above the Pd center of its neighbor. The stabilizing effect of this bond must overcome the strong Coulombic repulsion between the two dianions, which is facilitated by a polarizable environment as would be present in a crystal, but much more so when the effects of the neighboring counterions are factored in. These conclusions are extended to other [MX 4 ] 2− homodimers, where M represents other members of Group 10, namely Ni and Pt. 

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3. Rapid Simultaneous Removal of Toxic Anions [HSeO 3 ] − , [SeO 3 ] 2– , and [SeO 4 ] 2– , and Metals Hg 2+ , Cu 2+ , and Cd 2+ by MoS 4 2– Intercalated Layered Double Hydroxide

   https://doi.org/10.1021/jacs.7b07123  

   Ma, Lijiao ; Islam, Saiful M. ; Xiao, Chengliang ; Zhao, Jing ; Liu, Hongyun ; Yuan, Mengwei ; Sun, Genban ; Li, Huifeng ; Ma, Shulan ; Kanatzidis, Mercouri G. ( September 2017 , Journal of the American Chemical Society)
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. 

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5. Ultrafast Wiggling and Jiggling: Ir 2 (1,8-diisocyanomenthane) 4 2+

   https://doi.org/10.1021/acs.jpca.7b10215  

   Pižl, Martin ; Hunter, Bryan M. ; Greetham, Gregory M. ; Towrie, Michael ; Záliš, Stanislav ; Gray, Harry B. ; Vlček, Antonín ( November 2017 , The Journal of Physical Chemistry A)