Tetrahedral platinum(O) carbonyl. Crystal and molecular structure of tris(triphenylphosphine)carbonylplatinum

Nitrosyltris(triphenylphosphine)iridium cyclopropane solvate

“…If torsion angles round the M-P and P-C(phenyl ring) bonds are considered,* the variation among like-handed molecules in the two structures containing [Ir(NO)(PPh3) a] molecules is no more than a few degrees {trigonal [Pt(CO)(PPh3)3], being isomorphous with [Ir(NO)(PPh3)3], will not be further discussed}. This conformation is not exhibited by the other monoclinic polymorph of [Pt(CO)(PPh3) 3] (A1-bano, Basso Ricci & Bellon, 1969) and clearly must be related to the similar packing patterns in the compounds.…”

Stereochemistry of Platinum Organometallics

“…Colourless Pt(PPh 3 ) 3 CO, monoclinic [7] and rhombohedral [8] are the only examples of a pair of Pt(0) distortion isomers. The isomers consist of three bulky unidentate PPh 3 ligands and CO ligand in an approximately tetrahedral geometry about each Pt(0) atom.…”

“…Around each Pt(IV) atom there [78] (Table 3). contd….. (3) 21.664 (6) 19.487 (7) 91.01(1) (15) 19.954 (19) 19.832 (30) 103.96 (10) 104.24 (11) 91.52 (9) Cl 83.6 (7,8) Cl,Cl 85.0 (7,5) Footnotes: a). Where more than one chemically equivalent distance or angle is present, the mean value is tabulated.…”

“…In the series of mononuclear derivatives one example, Pt(II)(CH 2 Cl)( 3 -tmba)Cl [37] exists in three isomeric forms. Nineteen exist in two isomeric forms (Pt(0) [7], Pt(II) , Pt(IV) [35,36]). One example Pt(II)(SMe 2 ) 2 (Ph)(Cl) [12] exists in two isomeric forms (triclinic and monoclinic) and monoclinic contains two crystallographically independent molecules.…”

“…In this series of distortion isomers the Pt(0) atoms are tetrahedrally coordinated (PtP 3 C [7,8], PtC 4 [38], PtC 2 P 2 [39][40][41][42], PtC 2 PPt´ [84,87]). The mean Pt(0) -L bond distances elongated in the order: 1.86 Å (CO) < 2.055 Å ( -CO) The Pt(I) is tetrahedrally coordinated (PtCSPPt´) [74] with the mean Pt(1) -L bond distances elongated in the order: 1.845 Å (CO) < 2.263 Å ( -S) < 2.267 Å ( -PL) < (3) 11.991 (4) 22.602 (4) 90.50 (1) PtC2P2 C P 2.05 (2) 1.97 (2) 2.340 (4) 2.286 (4) C,C P,P C,P 84.3 (7) 100.3 (1) 87.7 (5,4.6) 171.9(4,4.7)…”