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557780-43-5

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557780-43-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 557780-43-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,7,8 and 0 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 557780-43:
(8*5)+(7*5)+(6*7)+(5*7)+(4*8)+(3*0)+(2*4)+(1*3)=195
195 % 10 = 5
So 557780-43-5 is a valid CAS Registry Number.

557780-43-5Relevant articles and documents

Guest-controlled incommensurate modulation in a meta-rigid metal-organic framework material

Li, Jiangnan,Zhou, Zhengyang,Han, Xue,Zhang, Xinran,Yan, Yong,Li, Weiyao,Smith, Gemma L.,Cheng, Yongqiang,McCormick McPherson, Laura J.,Teat, Simon J.,Frogley, Mark D.,Rudi?, Svemir,Ramirez-Cuesta, Anibal J.,Blake, Alexander J.,Sun, Junliang,Schr?der, Martin,Yang, Sihai

, p. 19189 - 19197 (2020)

Structural transitions of host systems in response to guest binding dominate many chemical processes. We report an unprecedented type of structural flexibility within a meta-rigid material, MFM-520, which exhibits a reversible periodic-to-aperiodic structural transition resulting from a drastic distortion of a [ZnO4N] node controlled by the specific host-guest interactions. The aperiodic crystal structure of MFM-520 has no three-dimensional (3D) lattice periodicity but shows translational symmetry in higher-dimensional (3 + 2)D space. We have directly visualized the aperiodic state which is induced by incommensurate modulation of the periodic framework of MFM-520·H2O upon dehydration to give MFM-520. Filling MFM-520 with CO2 and SO2 reveals that, while CO2 has a minimal structural influence, SO2 can further modulate the structure incommensurately. MFM-520 shows exceptional selectivity for SO2 under flue-gas desulfurization conditions, and the facile release of captured SO2 from MFM-520 enabled the conversion to valuable sulfonamide products. MFM-520 can thus be used as a highly efficient capture and delivery system for SO2.

Visible-Light Photoredox-Catalyzed Aminosulfonylation of Diaryliodonium Salts with Sulfur Dioxide and Hydrazines

Liu, Nai-Wei,Liang, Shuai,Manolikakes, Georg

supporting information, p. 1308 - 1319 (2017/04/18)

A photoredox-catalyzed three-component synthesis of N-aminosulfonamides starting from diaryliodonium salts, hydrazines and sulfur dioxide is reported. This reaction proceeds under mild conditions at room temperature and is driven by visible light. A simple bisulfite salt can be used as a readily available and easy-to-handle sulfur dioxide source. Mechanistic studies support a catalytic photoredox pathway with the diaryliodonium salt as convenient source for aryl radicals. (Figure presented.).

A palladium-catalyzed coupling reaction of aryl nonaflates, sulfur dioxide, and hydrazines

An, Yuanyuan,Xia, Hongguang,Wu, Jie

supporting information, p. 1665 - 1669 (2016/02/09)

A facile route to synthesise N-aminosulfonamides through a palladium-catalyzed coupling reaction of aryl nonaflates, sulfur dioxide, and hydrazines is reported. This transformation proceeds in the presence of Pd(OAc)2/XantPhos, and TBAB in 1,4-dioxane at 80°C, leading to the corresponding N-aminosulfonamides in moderate to good yields. The reaction scope has been demonstrated, and good functional tolerance is observed. A plausible mechanism is proposed through the insertion of sulfur dioxide.

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