Acetatobis(triphenylphosphine)copper(I)

Abstract

C38H3302PzCu, M= 647"13, monoclinic,

Complexes of Niobium(V) and Tantalum(V) Halides with Ligands that Contain N–C=O and P=O Functionalities: A Synthetic and Structural Study

“…As a consequence, the O(1)-C(1) interaction [1.328(2) Å] is significantly longer than a pure double bond, whereas C(1)-N(1) and C(1)-N(2) [1.336(2) and 1.334(2) Å] possess a significant π character, in order to maintain electron density on the sp 2 carbon. (13) It is noteworthy that the X-ray structure of 3a is, to the best of our knowledge, the first one reported for a tantalum (niobium) complex containing a urea ligand. More generally, the O-coordination fashion is the most common adopted by ureas and TMU in particular, a rare example of N-coordination mode being observed in [Pt(dien)-(NH 2 CONMe 2 )](CF 3 SO 3 ) 2 (dien = diethylenetriamine).…”

“…The Ta-Br bonds within the cation (mean value: 2.475 Å) and the anion (2.464 Å) are similar to those observed (2.583 and 2.487 Å, respectively) in the arsine derivative {TaBr 4 [1,2-(Me 2 As) 2 C 6 H 4 ]}[TaBr 6 ]. [13] As in 3a, the coordinated TMU ligands show an elongation of the C(1)-O(1) interaction [1.314(15) Å] and shortening of C(1)-N(1) [1.340(15) Å] and C(1)-N(2) [1.324(16) Å], compared to free ureas.…”

“…Then, compound 5d converts into 5c in 3 days, in CDCl 3 solution. Compound 5d shows 1 H NMR peaks at 7.80 (CH), 2.75 and 2.63 (NMe) ppm, 13 C NMR resonances at 162.0 (CO), 36.0 and 30.9 (NMe) ppm, and an IR absorption accounting for the CO group at 1660 cm -1 . As far as 5c is concerned, the NMR resonances are shifted toward higher frequencies [ 1 H NMR: 8.57 (CH); 3.48, 3.36 (NMe) ppm.…”

N,N‐Dialkylcarbamato Complexes of the d10 cations of copper, silver, and gold

“…It is possible that the PPh, adducts of the N,N-dialkylcarbamato complexes have a molecular structure similar to that reported for [Cu(O,CMe)(PPh,),] [12] and [Cu(O,CCF,)(PPh,),] [13]. In these compounds, the Cu-atom has a pseudo-tetrahedral geometry with a bidentate carboxylato ligand.…”

Acetatobis (triphenyl phosphine) silver(I)

“…The preparation, characterization, and X-ray single crystal structure of the analogous complex Cu(0 2 CCH 3 ) (Ph 3 P) 2 has been reported [2], The complex is a monomer with a bidentate acetate ligand in which the copper atom has a distorted tetrahedral environment. The crystal data are as follows: Μ = 647.13, monoclinic, P2 1 /a (systematic absences AO/: h = 2η + \;0k0:k = In + I), a = 18.041 (11), b = 11.044(7), c = 19.317(15) Ä, β = 121.87(10)", U = 3268.7 A 3 , Ζ = 4, D m = 1.32, D c = 1.32gcm" 3 .…”