944284-25-7Relevant academic research and scientific papers
Studies on reactivity of platinum-based heterobimetallic carbonyl clusters
Venkatesh, Sadhana,Sravani, Chinduluri,Steby,Vijayakrishna, Kari,Sivaramakrishna, Akella
, p. 1156 - 1166 (2015/04/14)
Reactivity of platinum-based trinuclear carbonyl clusters of the type L2PtRu2(CO)8, where L2 = 1,3-bis(diphenylphosphino)propane (dppp) and 1,2-bis(diphenylphosphino)ethane (dppe), is described. Oxidative additi
Thermolysis studies on platinacycloalkane complexes
Zheng, Feng,Sivaramakrishna, Akella,Moss, John R.
, p. 2457 - 2465 (2011/06/26)
Thermal decomposition studies on platinacycloalkanes of the type Pt(CH 2)mL2 (where m = 6,7,8,10 and L2 = dppp {1,3-bis(diphenylphosphino)propane}, dppe {1,2-bis(diphenylphosphino) ethane} or L = PPh3, tBu3P) are described. The results reveal that the organic product distribution depends on various factors such as the nature of ligand, the metal system, the mode of decomposition, the ring size and the temperature. Possible mechanistic pathways for the formation of various products are discussed. These platinacycloalkanes can be used as models for metallacycloalkane intermediates in catalytic reactions.
Novel reactivity aspects of cis-bis(1-alkenyl)platinum(II) compounds of the type Pt(CH2(CH2)nCHCH2) 2L2 (where L2 = dppp, dppe, dppm and n = 1, 2)
Sivaramakrishna, Akella,Moss, John R.,Su, Hong
, p. 3345 - 3350 (2011/02/16)
We describe the synthesis, structure and reactivity of novel bis(1-alkenyl)platinum(II) complexes, Pt[CH2(CH2) nCHCH2]2L2 (where L2 = dppp, dppe, dppm and n = 1, 2). The stability of the title complexes with the different ligands is discussed. The steric, chelating and electronic properties of the ligands have a significant impact on the structure as well as on the reactivity of the complexes. Novel reactions with elemental sulfur and carbon dioxide are described and discussed.
Synthesis, structure and reactivity of cis-[PtL2(1-alkenyl)2] complexes
Sivaramakrishna, Akella,Makhubela, Banothile C.E.,Zheng, Feng,Su, Hong,Smith, Gregory S.,Moss, John R.
, p. 44 - 52 (2009/01/31)
The synthesis and characterization of several new bis(1-alkenyl)platinum(II) complexes have been carried out. The structure of cis-[Pt(dppp)((CH2)6CH{double bond, long}CH2)2] has been determined by X-ray crystallography. The stability and reactivity of the compounds, cis-[PtL2((CH2)nCH{double bond, long}CH2)2] (n = 3 or 4 and L2 = 1,3-bis(diphenylphosphino)propane (dppp), 1,2-bis(diphenylphosphino)ethane (dppe), L = PPh3) is strongly dependent on the nature of ligand systems. It is found that the insertion of carbon monoxide into the metal-carbon bonds of the platinum alkenyl complexes is possible. Other reactions including transmetalation, intermolecular alkenyl migrations, oxidative addition of methyl iodide are described and the thermal decomposition of the bis(alkenyl) complexes are also reported.
High-yield synthesis of medium and large platinacycloalkanes from bis(alkenyl) precursors
Sivaramakrishna, Akella,Su, Hong,Moss, John R.
, p. 3541 - 3543 (2008/02/14)
Coming full circle: Bis(alkenyl)-platinum(II) complexes cis-[L 2Pt-{(CH2)nCH=CH2}2] (L = PPh3 or L2 = Ph2P(CH2) 3PPh2; n = 3-6) have been prepared and fully characterized. Ring-closing metathesis leads to new platinacycloalkenes, which can be hydrogenated to platinacycloalkanes with 9-, 11-, 13-, and 15-membered rings (see picture for 15-membered ring; Pt green, P orange, C blue, H white). (Chemical Equation Presented).
Selective isomerization of cis-PtL2(1-alkenyl)2 to cis-PtL2(2-alkenyl)2 complexes
Sivaramakrishna, Akella,Su, Hong,Moss, John R.
, p. 5786 - 5790 (2008/10/09)
Heating the 1-alkenyl complexes cis-[Pt(1-alkenyl)2L 2] [alkenyl = 1-pentenyl, 1-hexenyl, 1-heptenyl, and 1-octenyl; L2 = 1,3-bis(diphenylphosphino)propane (dppp) or 1,2- bis(diphenylphosphino)ethane (dppe)] to 100°C caused a quantitative isomerization to the corresponding 2-alkenyl complexes cis-[Pt-(2-alkenyl) 2L2]. This novel isomerization is strongly dependent on the length of the alkenyl chains as well as the nature of the ligand, L 2. The new 2-alkenyl complexes were fully characterized by analytical and spectroscopic methods. An X-ray crystal structure of cis-[Pt(2-pentenyl) 2(dppp)] confirms this isomerization. Possible reaction mechanisms are discussed.
