165680-93-3

Basic information

• Product Name: cis-[W(CO)4tBu₂Si(OPPh₂)2]
• CAS NO: 165680-93-3
• Molecular Weight: 840.577
• Mol File: 165680-93-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: cis-[W(CO)4tBu₂Si(OPPh₂)2](CAS DataBase Reference)
• NIST Chemistry Reference: cis-[W(CO)4tBu₂Si(OPPh₂)2](165680-93-3)
• EPA Substance Registry System: cis-[W(CO)4tBu₂Si(OPPh₂)2](165680-93-3)

Safety Data

• Hazardous Substances Data: 165680-93-3(Hazardous Substances Data)

Upstream product

• 12129-25-8 (bicyclo[2.2.1]hepta-2,5-diene)tetracarbonyltungsten⁽⁰⁾ 
• 165680-90-0 ((CH₃)3C)2Si(OP(C₆H₅)2)2 

Relevant articles and documents

Synthesis of the New Silanediyldiphosphinite tBu2Si(OPPh2)2 and it s Reactions with the Norbornadiene Complexes C7H8M(CO)4 (M=Cr, Mo, W). Crystal Structures of cis-M(CO)4[tBu2Si(OPPh2)2]

Silanediyldiphosphinite tBu2Si(OPPh2)2 1 has been synthesised. 1 reacts with the norbornadiene complexes C7H8M(CO)4 (M=Cr, Mo, W) to give six-membered chelate rings of the type cis-M(CO)4[tBu2Si(OPPh2)2] 2-4. The crystal structures of the chromium and molybdenum complexes cis-Cr(CO)4[tBu2Si(OPPh2)2]2 and cis-Mo(CO)4[tBu2Si(OPPh2)2]3 have been determined. Both complexes crystallise in the triclinic system (space group P1-) with unit cell parameters: (2) a=1093(3) pm, b=1477(5) pm, c=1542(5) pm; α=108.4(2)°, β=103.87(11)°, γ=104.57(10)°; U=2.143(12) nm^3; Z=2; (3) a=1097.8(2) pm, b=1483.7(2) pm and c=1554.3(2) pm; α=108.10(1)°, β=103.956(6)°, γ=104.213(7)°; U=2.1899(6) nm^3; Z=2. Both 2 and 3 consist of discrete, slightly distorted, octahedral monomers in which the six-membered chelate rings are essentially planar. In contrast, the conformations of the chelate rings found in crystal structures of analgous complexes vary from twist-boat to chaise longue .