X-ray and neutron diffraction study of the new cationic bis(hydrido)-bridged platinum-iridium complex [(PEt3)2Pt(.mu.-H)2IrH2(PEt3)2 ]+[BPh4]-

Albinati, Alberto; Emge, Thomas J.; Koetzle, Thomas F.; Meille, Stefano Valdo; Musco, A.; Venanzi, L. M.

doi:10.1021/ic00247a009

Cited by 19 publications

(4 citation statements)

References 5 publications

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“…0.1 Á longer than that determined by neutron diffraction in HMn(CO)s18 (1.60 (2) A). This difference is as expected19 for a bridging vs terminal hydride, from observations reported for compounds having both bridging and terminal hydrides, e.g., [(C5Me5) 21 The Re-H bond distance in 1 (1.827 (4) A) is shorter than the values of 1.878 (7) and 1.86 (4) A found by neutron diffraction for the bridging hydrides in [( PEt2Ph In both these compounds, a significant asymmetry in the bridge also is present (Pt-H = 1.731 (5) vs Ir-H = 1.881 (5) A, and Pt-H = 1.674 (4) vs Ag-H = 1.831 (3) A, respectively).…”

Section: Resultssupporting

confidence: 89%

Low-temperature neutron diffraction study on manganese-rhenium complexes HMn2Re(CO)14 and studies of a metal-metal exchange equilibrium that converts HMn2Re(CO)14 into HMnRe2(CO)14

Bullock¹,

Brammer²,

Schultz³

et al. 1992

J. Am. Chem. Soc.

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Section: Resultssupporting

confidence: 89%

Low-temperature neutron diffraction study on manganese-rhenium complexes HMn2Re(CO)14 and studies of a metal-metal exchange equilibrium that converts HMn2Re(CO)14 into HMnRe2(CO)14

Bullock¹,

Brammer²,

Schultz³

et al. 1992

J. Am. Chem. Soc.

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“…3.77 Å) of platinum and iridium. 21 In addition, the Pt⋯Ir distance for 6b is somewhat shorter than the non-bonding distances P(1)P( 4) and P( 2 1)°are greater than 120°, indicative of no metal-metal bonding. 19 Thus, the data for 6b indicate that there is a weak bonding interaction between the platinum and iridium atoms, which could be of the donor-acceptor or secondary metallophilic bonding type.…”

Section: Dalton Transactions Papermentioning

confidence: 95%

“…3.77 Å) of platinum and iridium. 21 In addition, the Pt..Ir distance for 6b is somewhat shorter than the non-bonding distances P(1)P(4) and P(2)P(3) of 3.041(2) and 20 3.053(2) Å, and the angles C(4)-C(3)-Pt = 111.4(6) and C(3)-C(4)-Ir = 113.9(6) o are less than the natural sp 2 bond angle of 120 o . The parameters can be compared with those for [Pt 2 Cl 2 (µ-PhCCH)(µ-dppm) 2 ] in which the Pt..Pt distance of 3.480(4) Å is longer and the angles C=C-Pt of 121(1) and 124(1) o are greater 25 than 120 o , indicative of no metal-metal bonding.…”

Section: Reactions Of Alkynes With Complexmentioning

confidence: 99%

Binuclear platinum–iridium complexes: synthesis, reactivity and luminescence

2015

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The chemistry of the heterobinuclear platinum-iridium complex [PtIr(CO)3(μ-dppm)2][PF6], 1, dppm = Ph2PCH2PPh2, is described. The reaction of a hydride with 1 gave [HPtIr(CO)2(μ-dppm)2], by displacement of the carbonyl ligand from platinum, while reaction of 1 with dihydrogen, hydrogen chloride or Ph2MeSiH gave the fluxional complex [PtIrH4(CO)(μ-dppm)2][PF6], [PtIrH2Cl2(CO)(μ-dppm)2][PF6], or [PtIrH(SiMePh2)(CO)2(μ-dppm)2][PF6], respectively, by oxidative addition at iridium. Complex 1 reacted, often regioselectively, with several alkynes to give the μ-η(1),η(1) bridging alkyne complexes [PtIr(μ-RCCR')(CO)2(μ-dppm)2][PF6], R = H, R' = Ph, 4-C6H4Me, CO2Me; R = Ph, R' = CO2Me; R = R' = CO2Me. The complex [PtIr(μ-HCC-4-C6H4Me)(CO)2(μ-dppm)2][PF6] reacted reversibly with CO to give [PtIr(μ-HCC-4-C6H4Me)(CO)3(μ-dppm)2][PF6] and [PtIr(CO)3(μ-dppm)2][PF6], 1. With HCl, [PtIr(μ-HCC-4-C6H4Me)(CO)2(μ-dppm)2][PF6] reacted to give [PtIrHCl(μ-HCC-4-C6H4Me)(CO)2(μ-dppm)2][PF6], by oxidative addition at iridium, and then the alkenylplatinum derivative [PtIrCl{HC=CH(4-C6H4Me)}(CO)2(μ-dppm)2][PF6]. [PtIr(μ-HCC-4-C6H4Me)(CO)2(μ-dppm)2][PF6] reacted slowly with dihydrogen to give 4-MeC6H4CH=CH2 and [PtIrH4(CO)(μ-dppm)2][PF6]. The complex [PtIr(μ-HCCPh)(CO)2(μ-dppm)2][PF6] is intensely luminescent in solution at room temperature, with features characteristic of a d(8)-d(8) face-to-face complex.

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“…The self-exchange formally involves the transfer of two electrons from Rh I to Rh III and two hydride ligands in the opposite direction and could proceed through a symmetrical bis(hydrido)bridged intermediate. Many stable bis(hydrido)-bridged complexes are known, 33,34 and evidence for a H 2 -bridged Ru II 2 system 35 and for dihydride transfer in binuclear systems [36][37][38] has been presented. An Ir I -catalyzed isomerization of its Ir III dihydride 38 resembles the system studied here.…”

Section: Rh(bpymentioning

confidence: 99%

Reversible Formation of Bis(2,2‘-bipyridine)rhodium(III) Dihydride from Bis(2,2‘-bipyridine)rhodium(I) and Dihydrogen. Direct Transfer of Dihydrogen from Rhodium(III) Dihydride to Rhodium(I)

et al. 1998

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X-ray and neutron diffraction study of the new cationic bis(hydrido)-bridged platinum-iridium complex [(PEt3)2Pt(.mu.-H)2IrH2(PEt3)2 ]+[BPh4]-

Cited by 19 publications

References 5 publications

Low-temperature neutron diffraction study on manganese-rhenium complexes HMn2Re(CO)14 and studies of a metal-metal exchange equilibrium that converts HMn2Re(CO)14 into HMnRe2(CO)14

Low-temperature neutron diffraction study on manganese-rhenium complexes HMn2Re(CO)14 and studies of a metal-metal exchange equilibrium that converts HMn2Re(CO)14 into HMnRe2(CO)14

Binuclear platinum–iridium complexes: synthesis, reactivity and luminescence

Reversible Formation of Bis(2,2‘-bipyridine)rhodium(III) Dihydride from Bis(2,2‘-bipyridine)rhodium(I) and Dihydrogen. Direct Transfer of Dihydrogen from Rhodium(III) Dihydride to Rhodium(I)

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