More Like this

1. Diisobutylammonium triphenyl(2-thiolatoacetato-κ 2 O , S )stannate(IV)

   https://doi.org/10.1107/S2414314624007429  

   Song, Xueqing ; Yeibyo, Woldegebriel ; Li, William ; Pike, Robert D ( August 2024 , IUCrData)

   Crystals of the title salt, (C₈H₂₀N)[Sn(C₆H₅)₃(C₂H₂O₂S)], comprise diisobutylammonium cations and mercaptoacetatotriphenylstannate(IV) anions. The bidentate binding mode of the mercaptoacetate ligand gives rise to a five-coordinated, ionic triphenyltin complex with a distortedcis-trigonal–bipyramidal geometry around the tin atom. In the crystal, charge-assisted ammonium-N—H...O(carboxylate) hydrogen-bonding connects two cations and two anions into a four-ion aggregate. Two positions were resolved for one of the phenyl rings with the major component having a site occupancy factor of 0.60 (3).

    

   more » « less
2. 5-([( Z )-Methoxyimino]{2-[(2-methylphenoxy)methyl]phenyl}methyl)-1,3,4-oxadiazole-2(3 H )-thione dimethyl sulfoxide monosolvate

   https://doi.org/10.1107/S2414314623002377  

   Shripanavar, Chetan Shrimandhar ; Balerao, Rishik ; Butcher, Ray J. ( March 2023 , IUCrData)

   The title compound, C 18 H 17 N 3 O 3 S·C 2 H 6 OS, crystallizes in the monoclinic space group P 2 1 /c . In the crystal, C 1 1 (9) chains of C—H...O interactions are formed, propogating in the c -axis direction. The N—H hydrogen atom forms a strong hydrogen bond with the oxygen atom of a DMSO solvate molecule. 

   more » « less
3. Engineering 2‐ oxoglutarate dehydrogenase to a 2‐oxo aliphatic dehydrogenase complex by optimizing consecutive components

   https://doi.org/10.1002/aic.16769  

   Chakraborty, Joydeep ; Nemeria, Natalia S. ; Zhang, Xu ; Nareddy, Pradeep R. ; Szostak, Michal ; Farinas, Edgardo ; Jordan, Frank ( September 2019 , AIChE Journal)

   Multienzyme complexes have the potential for green catalysis of sequential reactions. TheEscherichia coli2‐oxoglutarate dehydrogenase complex (OGDHc) was converted from a 2‐oxoglutaratedehydrogenase to a 2‐oxoaliphaticdehydrogenase complex by engineering consecutive components. OGDHc catalyzes succinyl‐CoA synthesis in the Krebs cycle. OGDHc is composed of three components: E1o, 2‐oxoglutarate dehydrogenase; E2o, dihydrolipoylsuccinyl transferase; E3, dihydrolipoyl dehydrogenase. There are three substrate checkpoints. One is in E1o and two in E2o. OGDHc was reprogrammed to accept alternative substrates by evolving the E1o and E2o components. Wt‐ODGHc does not accept aliphatic substrates. E1o was previously engineered to accept a non‐natural aliphatic substrate, 2‐oxovalerate (2‐OV). E2o also required engineering to accept 2‐OV in the overall reaction. Hence, saturation mutagenesis libraries of E2o were screened for 2‐OV activity. E2o‐S333M, E2o‐H348F, E2o‐H348Q, and E2o‐H348Y were identified to show activity for 2‐OV in the reconstituted complex. Variants also displayed activity for larger aliphatic substrates.

    

   more » « less
4. Late 3 d -Transition Metal Complexes Bearing a Bis -Phosphine Borane Ligand, PhB(CH 2 P t Bu 2 ) 2

   https://doi.org/10.1021/acs.organomet.2c00378  

   Handford, Rex C. ; Zhong, Lingfei ; Tilley, T. Don ( September 2022 , Organometallics)
5. Sr(Ag 1−x Li x ) 2 Se 2 and [Sr 3 Se 2 ][(Ag 1−x Li x ) 2 Se 2 ] Tunable Direct Band Gap Semiconductors

   https://doi.org/10.1002/ange.202301191  

   Zhou, Xiuquan ; Wilfong, Brandon ; Chen, Xinglong ; Laing, Craig ; Pandey, Indra R. ; Chen, Ying‐Pin ; Chen, Yu‐Sheng ; Chung, Duck‐Young ; Kanatzidis, Mercouri G. ( February 2023 , Angewandte Chemie)

   Synthesizing solids in molten fluxes enables the rapid diffusion of soluble species at temperatures lower than in solid‐state reactions, leading to crystal formation of kinetically stable compounds. In this study, we demonstrate the effectiveness of mixed hydroxide and halide fluxes in synthesizing complex Sr/Ag/Se in mixed LiOH/LiCl. We have accessed a series of two‐dimensional Sr(Ag_1−xLi_x)₂Se₂layered phases. With increased LiOH/LiCl ratio or reaction temperature, Li partially substituted Ag to form solid solutions of Sr(Ag_1−xLi_x)₂Se₂withxup to 0.45. In addition, a new type of intergrowth compound [Sr₃Se₂][(Ag_1−xLi_x)₂Se₂] was synthesized upon further reaction of Sr(Ag_1−xLi_x)₂Se₂with SrSe. Both Sr(Ag_1−xLi_x)₂Se₂and [Sr₃Se₂][(Ag_1−xLi_x)₂Se₂] exhibit a direct band gap, which increases with increasing Li substitution (x). Therefore, the band gap of Sr(Ag_1−xLi_x)₂Se₂can be precisely tuned via fine‐tuningxthat is controlled by only the flux ratio and temperature.

    

   more » « less