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144613-92-3

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144613-92-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 144613-92-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,6,1 and 3 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 144613-92:
(8*1)+(7*4)+(6*4)+(5*6)+(4*1)+(3*3)+(2*9)+(1*2)=123
123 % 10 = 3
So 144613-92-3 is a valid CAS Registry Number.

144613-92-3Relevant articles and documents

Tris(2-methoxyphenyl) phosphite complexes of platinum(n): The cis preference of triaryl phosphite ligands and the effect of oxidation state on metal-phosphite bonding

Crispini, Alessandra,Harrison, Karl N.,Orpen, A. Guy,Pringle, Paul G.,Wheatcroft, James R.

, p. 1069 - 1076 (2007/10/03)

The complexes cis-[PtX2{P(OC6H4OMe-2)3} 2] (X = Cl, Br or I) have been prepared by treatment of the corresponding [PtX2(cod)] (cod = cycloocta-1,5-diene) with P(OC6H4OMe-2)3. That with X = Cl reacted with 1 or 2 equivalents of SnCl2 to give cis-[PtCl(SnCl3){P(OC6H4OMe-2) 3}2] or trans-[Pt(SnCl3)2{P(OC6H4OMe-2) 3}2]. The unstable hydride trans-[PtH(Cl){P(OC6H4OMe-2)3}2] was detected when cis-[PtCl2{P(OC6H4OMe-2)3} 2] was treated with NaBH4 or [Pt{P(OC6H4OMe-2)3}3] with HCl. The organoplatinum complexes cis-[PtR2{P(OC6H4OMe-2)3} 2] and cis-[PtR(X){P(OC6H4OMe-2)3}2] (R = Me, X = Cl, I or CN; R = Et, X = Cl) were obtained from platinum-(II) and -(0) precursors. Addition of HBF4 to cis-[PtMe2{P(OC6H4OMe-2)3} 2], in the presence of H2O or MeCN, gave the cationic species cis-[PtMe(L){P(OC6H4OMe-2)3} 2][BF4] (L = H2O or MeCN). The significance of the observation that complexes of the type [PtMe(L){P(OC6H4OMe-2)3}2] are invariably cis is discussed. The crystal structures of cis-[PtCl2{P(OC6H4OMe-2)3} 2] and cis-[PtMe(OH2){P(OC6H4OMe-2)3} 2][BF4]·CH2Cl2 have been determined. These, together with those previously reported for P(OC6H4OMe-2)3 and [Pt(η-C2H4)-{P(OC6H4OMe-2) 3}2], show pronounced variation in P-O lengths and O-P-O bond angles consistent with the greater importance of Pt-P π bonding in the platinum(0) species. The phosphite P(OC6H4OMe-2)3 shows a range of conformations in the structures and that with anti, gauche, gauche (agg) conformation about the P-O bonds apparently favoured in general but ggg attainable in the absence of steric crowding. In cis-[PtMe(OH2){P(OC6H4OMe-2)3} 2][BF4]·CH2Cl2, intramolecular hydrogen bonding leads to an unusual aag conformation. Weak Pt ... O interactions involving the OMe groups of the phosphite ligand are observed in these structures. The correlation of P-O length and O-P-O angle variation is mirrored by similar behaviour for 133 Z-P(OPh)3 (Z = O, N or metal) structures. These observations are consistent with the now conventional view of M-P π bonding.

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