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124042-57-5

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124042-57-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 124042-57-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,4,0,4 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 124042-57:
(8*1)+(7*2)+(6*4)+(5*0)+(4*4)+(3*2)+(2*5)+(1*7)=85
85 % 10 = 5
So 124042-57-5 is a valid CAS Registry Number.

124042-57-5Downstream Products

124042-57-5Relevant articles and documents

Functionalized Basket-Shaped Hosts. Synthesis and Complexation Studies with (Alkali) Matal and Ammonium and Diammonium Ions

Smeets, Jan W.,Dalen, Lydia van,Kaats-Richter, Veronica E. M.,Nolte, Roeland J. M.

, p. 454 - 461 (2007/10/02)

Functionalized basket-shaped hosts have been synthesized from the concave building block 1,3:4,6-bis(3,6-dihydroxy-1,2-xylylene)tetrahydro-3a,6a-diphenylimidazoimidazole-2,5(1H,3H)-dione (1).To this end, N-substituted 1,4,10,13-tetraoxa-7-azatridecamethylene bridges were attached to the 3,6- and 3',6'-positions of the xylylene rings of 1.The substituents at the nitrogen atom in the bridge include: 5-hydroxy-3-oxapentyl, benzyl, hydrogen, 5-(N-(benzyloxycarbonyl)-L-histidyl)-3-dioxapentyl, and 5-acetyl-3-oxapentyl.The baskets complex alkali metal and ammonium guests, as well as aliphatic and aromatic diammonium guests, all in a 1:1 ratio.Using the picrate extraction technique, free energies of binding for the new hosts with 19 guests were determined.Extremely strong binding (-ΔG0 values up to 18 kcal mol-1) was observed for the complexes between the hosts and o-phenylenediammonium dipicrate.The origin of this phenomenon is discussed.The host with histidyl substituents easily forms a 1:1 complex with Zn(OTf)2.

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