Carbon-13 NMR of bis(cyclopentadienyl)titanium and -zirconium acetylides

Sebald, Angelika; Fritz, P.; Wrackmeyer, Bernd

doi:10.1016/0584-8539(85)80194-x

Cited by 31 publications

(8 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…104.1( 13) C(28)-P(2)-C(30) 105.6( 15) (15) 123.9(21) Pt(2)-C( 14)-C(19) 125.3(16) elemental analyses correspond apparently to 1:1 adducts of the desilylated starting material and the alcohols.…”

Section: Resultsmentioning

confidence: 97%

Generation of (.mu.-Ethynediyl)(methylalkoxycarbene)diplatinum Complexes from Reaction of cis,trans-[(OC)(C6F5)2Pt(.mu.-.eta.2-C.tplbond.CSiMe3)Pt(C.tplbond.CSiMe3)L2] with ROH (R = Et, Me)

Berenguer¹,

Forniés²,

Lalinde³

et al. 1995

Organometallics

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 97%

Generation of (.mu.-Ethynediyl)(methylalkoxycarbene)diplatinum Complexes from Reaction of cis,trans-[(OC)(C6F5)2Pt(.mu.-.eta.2-C.tplbond.CSiMe3)Pt(C.tplbond.CSiMe3)L2] with ROH (R = Et, Me)

Berenguer¹,

Forniés²,

Lalinde³

et al. 1995

Organometallics

View full text Add to dashboard Cite

“…Furthermore, the bite angle C(1)−Ti(1)−C(6) is decreased from 102.8(2)° in 6 to 90.3(3)° in 3a . A further typical observation for heterodinuclear tweezer complexes is a trans -deformation of the Ti−C⋮C−SiMe 3 fragments [Ti(1)−C(1)−C(2) 163.9(7)°, C(1)−C(2)−Si(1) 163.9(8)°, Ti(1)−C(6)−C(7) 165.6(8)°, C(6)−C(7)−Si(2) 165.0(8)°], which are linear [Ti−C⋮C 175.8(4)°, 178.2(5)°; C⋮C−Si 174.8(4)°, 178.3 (5)°] in the noncoordinated bis(alkynyl) titanocene species 6 . This fragment is linear in the starting compound 6 .…”

Section: Resultsmentioning

confidence: 99%

Mono-, Di-, and Tricarboxylic Acids: Central Building Blocks for the Formation of Multinuclear Transition Metal Complexes

et al. 2000

View full text Add to dashboard Cite

The synthesis and characterization of the di-, tetra-, and hexanuclear titanium(IV)-copper-(I) carboxylates {[Ti](CtCSiMe 3 ) 2 }CuO 2 CR 2 (3) {3a: R 2 ) Me, 3b: R 2 ) C 6 H 5 , 3c: R 2 ) CH 2 C 6 H 5 , 3d: R 2 ) CHdCMe 18) is described. All of these complexes are easily accessible by the reaction of {[Ti](CtCR 1 ) 2 }CuMe (1a: R 1 ) SiMe 3 , 1b: R 1 ) t Bu) with the corresponding carboxylic acids in different stoichiometric ratios of the reactants. Furthermore, the preparation and reaction chemistry of the alkyne-stabilized copper(I) percarboxylate 10) is discussed. As the central organic building block, all complexes contain mono-, di-, or tricarboxylic units. The latter two allow for the subsequent addition of further titanium(IV)-copper(I) assemblies onto these entities. The X-ray structure analyses of 3a and 13a are reported. Within the {[Ti](CtCR 1 ) 2 }CuOC(O)R 2 array the copper(I) center is η 2 -coordinated by both R 1 CtC groups of the organometallic tweezer [Ti](CtCR 1 ) 2 and η 1 -bonded by one oxygen atom of the O 2 CR 2 unit. Cyclic voltammetric studies on representative examples are presented and discussed comparatively.

show abstract

“…The π-conjugated polymetallic complexes described here jugated tri-, tetra-, and pentanuclear complexes [{(CO) 5 Mϭ can be considered as monomers for the synthesis of or- (25), and 10 ml of THF were added, the dark red solution was stirred 818 (100), 790 (18) ] the yellow solution for 30 min at Ϫ80°C, the formation of a white absorption corrections were employed (ψ-scans with 10 reflections).…”

Section: Full Papermentioning

confidence: 99%

“…The red biscarbene complexes 9a, b were obtained in yields of 67% (9a) and 68% (9b), respectively. Tweezer compounds such as the bisalkynyl substituted titanocene complexes of the type [(η 5 -C 5 H 4 R) 2 Ti(CϵCRЈ) 2 ] are well known [16] [17] [18] . The formation of monoalkynyl substituted titanocenes [(η 5 -C 5 H 4 R) 2 TiCl(CϵCRЈ)] by reaction of equimolar amounts of an acetylide and a metal dihalide could also be observed [16] .…”

Section: Introductionmentioning

confidence: 99%

Polynuclear Complexes with Propynylidene C3-Bridges: General Synthetic Route to Bis-, Tris-, and Tetrakis(ethynylcarbene) Complexes

Hartbaum

Roth

Fischer³

1998

Eur. J. Inorg. Chem.

View full text Add to dashboard Cite

The sequential reaction of two equivalents of the dimethylamino(ethynyl)carbene complexes [(CO)5M=C(NMe2)C≡CH] [M = W (1a), Cr (1b)] with two equivalents of nBuLi and one equivalent of a transition metal dichloride, [Cl2M′(Ln)], affords trinuclear biscarbene complexes of the type [(CO)5M=C(NMe2)C≡C−M′(Ln)−C≡CC(NMe)2=M(CO)5] [M′(Ln) = Ni(PEt3)2 (2a, b), Pd(PEt3)2 (3a, b), Pt(PEt3)2 (4a, b), Fe(dmpe)2 (6a), Hg (8a), Ti(η5‐C5H5)2 (9a, b)] [dmpe = 1,2‐bis(dimethylphosphino)ethane]. Treatment of 1a with equimolar amounts of first nBuLi and then [Cl2M′(Ln)] results in the formation of the monosubstitution products [(CO)5W=C(NMe2)C≡CM′(Ln)] [M′(Ln) = trans‐Pd(PEt3)2Cl (5a), trans‐Fe(dmpe)2Cl (7a)]. Additionally, the synthesis of the heterobimetallicethynylcarbene complex [(CO)5W=C(NMe2)C≡CPd(PEt3)2C≡CH] (10a), starting from 1a and [ClPd(PEt3)2C≡CH], is described. When three equivalents of 1a are treated, first with three equivalents of nBuLi and then with one equivalent of the trihalides PCl3 or BBr3, the novel tris(ethynylcarbene) complexes [{(CO)5W=C(NMe2)C≡C}3E] [E = B (11a), P (12a)] are obtained. The reaction of four equivalents of 1a,b with four equivalents of nBuLi, followed by addition of one equivalent of a group 14 tetrachloride [M′Cl4], yields the novel tetrakis(ethynylcarbene) complexes [{(CO)5M=C(NMe2)C≡C}4M′] [M′ = Si (13a, b), Ge (14a), Sn (15a, b)]. The complexes 8a, 9a, 12a, and 15a were characterized by X‐ray structural analyses. All spectroscopic and structural data suggest that the carbene fragments and the central transition metal or heteroatom in these new bis‐, tris‐, and tetrakis(ethynylcarbene) complexes interact only weakly.

show abstract

Carbon-13 NMR of bis(cyclopentadienyl)titanium and -zirconium acetylides

Cited by 31 publications

References 14 publications

Generation of (.mu.-Ethynediyl)(methylalkoxycarbene)diplatinum Complexes from Reaction of cis,trans-[(OC)(C6F5)2Pt(.mu.-.eta.2-C.tplbond.CSiMe3)Pt(C.tplbond.CSiMe3)L2] with ROH (R = Et, Me)

Generation of (.mu.-Ethynediyl)(methylalkoxycarbene)diplatinum Complexes from Reaction of cis,trans-[(OC)(C6F5)2Pt(.mu.-.eta.2-C.tplbond.CSiMe3)Pt(C.tplbond.CSiMe3)L2] with ROH (R = Et, Me)

Mono-, Di-, and Tricarboxylic Acids: Central Building Blocks for the Formation of Multinuclear Transition Metal Complexes

Polynuclear Complexes with Propynylidene C3-Bridges: General Synthetic Route to Bis-, Tris-, and Tetrakis(ethynylcarbene) Complexes

Contact Info

Product

Resources

About