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1. Facile Light-Induced Transformation of [Ru ^II (bpy) ₂ (bpyNO)] ²⁺ to [Ru ^II (bpy) ₃ ] ²⁺

   https://doi.org/10.1021/acs.inorgchem.0c01446  

   Karbakhsh Ravari, Alireza; Pineda-Galvan, Yuliana; Huynh, Alexander; Ezhov, Roman; Pushkar, Yulia (October 2020, Inorganic Chemistry)

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2. “Bottled” spiro-doubly aromatic trinuclear [Pd ₂ Ru] ⁺ complexes

   https://doi.org/10.1039/D0SC04469E  

   Kulichenko, Maksim; Fedik, Nikita; Monfredini, Anna; Muñoz-Castro, Alvaro; Balestri, Davide; Boldyrev, Alexander I.; Maestri, Giovanni (January 2021, Chemical Science)

   null (Ed.)

   Following an ongoing interest in the study of transition metal complexes with exotic bonding networks, we report herein the synthesis of a family of heterobimetallic triangular clusters involving Ru and Pd atoms. These are the first examples of trinuclear complexes combining these nuclei. Structural and bonding analyses revealed both analogies and unexpected differences for these [Pd 2 Ru] + complexes compared to their parent [Pd 3 ] + peers. Noticeably, participation of the Ru atom in the π-aromaticity of the coordinated benzene ring makes the synthesized compound the second reported example of ‘bottled’ double aromaticity. This can also be referred to as spiroaromaticity due to the participation of Ru in two aromatic systems at a time. Moreover, the [Pd 2 Ru] + kernel exhibits unprecedented orbital overlap of Ru d z2 AO and two Pd d xy or d x2−y2 AOs. The present findings reveal the possibility of synthesizing stable clusters with delocalized metal–metal bonding from the combination of non-adjacent elements of the periodic table which has not been reported previously. 

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3. Electronic Structure of Ru ₂ ⁶⁺ Complexes with Electron-Rich Anilinopyridinate Ligands

   https://doi.org/10.1021/acs.inorgchem.1c03346  

   Roy, Michael D.; Trenerry, Michael J.; Thakuri, Biswash; MacMillan, Samantha N.; Liptak, Matthew D.; Lancaster, Kyle M.; Berry, John F. (February 2022, Inorganic Chemistry)
4. Selective NO _x ^– Electroreduction to Ammonia on Isolated Ru Sites

   https://doi.org/10.1021/acsnano.2c09691  

   Ke, Zunjian; He, Dong; Yan, Xingxu; Hu, Wenhui; Williams, Nicholas; Kang, Hongxing; Pan, Xiaoqing; Huang, Jier; Gu, Jing; Xiao, Xiangheng (February 2023, ACS Nano)
5. Photocrystallography of [Ru(bpy) ₂ (dmso) ₂ ] ²⁺ reveals an O-bonded metastable state

   https://doi.org/10.1039/D3SC01526B  

   Marr, Zoe Y.; Thapa Magar, Rajani; Fournier, Bertrand; Benedict, Jason B.; Rack, Jeffrey J. (June 2023, Chemical Science)

   We report the first instance of observing the phototriggered isomerization of dmso ligands on a bis sulfoxide complex, [Ru(bpy) 2 (dmso) 2 ], in the crystalline solid state. The solid-state UV-vis spectrum of the crystal demonstrates an increase in optical density around 550 nm after irradiation, which is consistent with the solution isomerization results. Digital images of the crystal before and after irradiation display a notable color change (pale orange to red) and cleavage occurs along planes, (1̄01) and (100), during irradiation. Single crystal X-ray diffraction data also confirms that isomerization is occurring throughout the lattice and a structure that contains a mix of the S , S and O , O / S , O isomer was attained from a crystal irradiated ex situ . In situ irradiation XRD studies reveal that the percentage of the O-bonded isomer increases as a function of 405 nm exposure time. 

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