Organometallic Compounds

ABC26IN0259 · Correct order of M-C bond length of metallocenes (a-c) 1. [Fe(eta 5-Cp)2] 2. [Ni(eta 5-Cp)2] 3. [Co(eta 5-Cp)2] is— · 2016

ABC26IN0227 · Oxidation occurs very easily in case of · JUNE 2011

ABC26IN0487 · The value of M-C stretching frequencies of (i) [V(CO)6]-, (ii) [Cr(CO)6] and (iii) [Mn(CO)6]+following the trend · 2005-2021

ABC26IN1344 · Oxidation occurs very easily in case of · JUNE 2011

ABC26IN0490 · [Co(CO)4] is isolobal with · 2005-2021

ABC26IN0491 · The CORRECT order of the CO stretching vibrational frequency is · 2005-2021

ABC26IN1347 · In the hydroformylation reaction, the intermediate CH3CH2CH2Co(CO)4 : · JUNE 2011

ABC26IN0493 · Considering the quadrupolar nature of M-M bond in [Re2Cl8]2-, the M-M bond order in [Re2Cl4 (PMe2Ph)4]+ and [Re2Cl4 (PMe2Ph)4] respectively… · 2005-2021

ABC26IN0494 · In the complex, [Ni2 (eta 5-Cp)2(CO)2], the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence… · 2005-2021

ABC26IN1350 · The stable cyclopentadienyl complex of beryllium is · DEC 2011

ABC26IN0495 · The correct classification of [B5H5]2-, B5H9 and B5H11 respectively is · 2005-2021

ABC26IN0229 · In the trans-PtCl2L(CO) complex, the CO stretching frequency for L = NH3, pyridine, NMe3 decreases in the order. · 2011

ABC26IN1353 · In the trans- PtCl2 L(CO) complex, the CO stretching frequency for L=NH3, pyridine, NMe3 decreases in the order. · DEC 2011

ABC26IN0498 · Zeise's salt is represented as · 2005-2021

ABC26IN1354 · The catalyst involved in carrying out the metathesis of 1-butene to give ethylene and 3-hexene is: · DEC 2011

ABC26IN0500 · The Bronsted acidity of boron hydrides follows the order · 2005-2021

ABC26IN0501 · White phosphorus, P4, belongs to the · 2005-2021

ABC26IN1357 · The reactions of Ni(CO)4 with the ligand (L=PMe3. or.P(OMe)3) L yields Ni(CO)3 L. The reaction is · JUNE 2012

ABC26IN0502 · The number of M-M bonds in Ir4(CO)12 are · 2005-2021

ABC26IN1358 · Among the following the strongest oxidizing agent is: · JUNE 2012

ABC26IN1359 · For the reaction, trans- [IrCl(CO) (PPh3)2]+Cl2 → trans - [IrCl3(CO) (PPh3)2] the correct observation · JUNE 2012

ABC26IN1362 · The final product of the reaction [Mn(CO)6]+ + MeLi → is: · JUNE 2012

ABC26IN0509 · The number of ‘framework electron pairs’ present in the borane cluster [B12H12]2- is: · 2005-2021

ABC26IN1365 · The substitution of eta 5-Cp group with nitric oxide is the easiest for · DEC 2012

ABC26IN0510 · The reaction between {PdCl4]2- and C2H4 produces a new compound. Compare to free C2H4, the C-C bond order of the product is: · 2005-2021

ABC26IN1367 · Complexes of general formula, fac- [Mo(CO)3(phosphite)3] have the C-O stretching bands given below. Phosphines: PF3(A); PCl3(B)… · DEC 2012

ABC26IN0513 · The product of the reaction between CH3 Mn(CO)5 and 13 CO is: · 2005-2021

ABC26IN0514 · The number of terminal carbonyl groups present in Fe2(CO)9 is · 2005-2021

ABC26IN0515 · An intermediate formed during the hydroformylation of olefins using Co2(CO)8 as catalyst is · 2005-2021

ABC26IN0516 · Decarbonylation reaction of [cis- (CH3 CO) Mn (13 CO)(CO)4] yields X, Y and Z, where X= [(CH3) Mn(CO)5]; Y= [cis-(CH3) Mn (13 CO) CO4]; Z=… · 2005-2021

ABC26IN0518 · An example of nido-borane from the following is · 2005-2021

ABC26IN0237 · The ligand in uranocene is: · 2013

ABC26IN0519 · The reaction of [Cp2 TaMe2] I (Cp=C5 H5-)with NaOMe yields. · 2005-2021

ABC26IN1374 · The oxidation state of molybdenum in [ (eta 7 -tropylium) Mo(CO)3]+is: · JUNE 2013

ABC26IN0238 · The orders of reactivity of ligands, NMe3 PMe3, and CO with complexes MeTiCl, and (CO)5Mo (thf) are · 2013

ABC26IN1376 · The orders of reactivity of ligands, NMe3 PMe3, and CO with complexes MeTiCl, and (CO)5 Mo (thf) are · JUNE 2013

ABC26IN0524 · When one CO group is replaced by PPh3 in [Cr(CO)6], which one of the following statement is TRUE? · 2005-2021

ABC26IN1380 · Which of the following in NOT suitable as catalyst for hydroformylation? · DEC 2013

ABC26IN0527 · The hapticity of cycloheptatriene, (C7 H8), in Mo (C7 H8)(CO)3 is ____ · 2005-2021 self-practice

ABC26IN0528 · The structure type and shape of the polyhedral (skeletal) framework of the carborane Me2C2B10H10, respectively, are · 2005-2021

ABC26IN0241 · The correct statement regarding terminal/bridging CO groups in solid Co4(CO)12 and Ir4(CO)12 is · 2013

ABC26IN0530 · The reaction of equimolar quantities of Fe(CO)5 and OH-gives a complex species X which on further reaction with MnO2 give species Y. X and… · 2005-2021

ABC26IN0531 · In the following reaction, the stereochemistry of the major product is predicted by the · 2005-2021 self-practice

ABC26IN1385 · Among the following, the correct statement is · DEC 2013

ABC26IN0532 · The product obained in the reaction of Mn2(CO)10 with Br2 is · 2005-2021

ABC26IN1386 · Substitution of L with other ligands will be easiest for the species · DEC 2013

ABC26IN1387 · Reaction of Ph2PCH2CH2PPh2 with [RhCl(CO)2]2 in a 2:1 molar ratio gives a crystalline solid A. The IR spectrum of complex A shows nu CO at… · DEC 2013

ABC26IN0534 · The CORRECT statement regarding the substitution of coordinated ligands in Ni(CO)4 and Co(NO)(CO)3 is: (Given: Co–N–O bond is nearly… · 2005-2021

ABC26IN1389 · The ligand(s) that is (are) fluxional in [(eta 5-C5H5)(eta -C5H5)Fe(CO)2] in the temperature range 221-298K, is (are) · JUNE 2014

ABC26IN0244 · Amongst the following which is not isolobal pairs · 2014