ABC26IN1348 · In Ziegler-Natta catalysis the commonly used catalyst system is: · JUNE 2011
Insertion Elimination
ABC26IN0271 · For the following reaction, correct statement (S) is/are · 2018
ABC26IN1471 · For the following reaction, correct statement ( S ) is/are · JUNE 2018
Metal Alkene Alkyne
ABC26IN0523 · An efficient catalyst for hdrogenation of alkenes is [Rh (PPh3 )3 Cl ]. However, [Ir (PPh3 )3 Cl ] does not catalyze this reaction, because · 2005-2021
ABC26IN0242 · The electrophile Ph3C reacts with [( 5-C5H5)Fe(CO)2(CDMe2)]+ to give a product A. The product A is formed because · 2013
ABC26IN1384 · The electrophile Ph3 C reacts with [ (5-C5 H5 ) Fe(CO)2 (CDMe2 ) ]+to give a product A . The product A is formed because · DEC 2013
ABC26IN1447 · The rate of alkene coordination to [PtCl4 ]2- is highest for · DEC 2016
Metal Carbonyls
ABC26IN0226 · A and F 3. A and D 4. C and E · JUNE 2011
ABC26IN0486 · For the metal - olefin complexes (i) [PtCl3 (C2 H4 ) ]-and (ii) [PtCl3 (C2 F4 ) ]-, the correct statement is that · 2005-2021
ABC26IN1343 · Identify the order according to increasing stability of the following organometallic TiMe4, Ti (CH2 Ph )4, Ti(i-Pr)4, and TiEt4(Me= methyl… · JUNE 2011
ABC26IN0228 · Complex in which organic ligand is having only sigma -bond with metal is: · JUNE 2011
ABC26IN1352 · The number of metal-metal bonds in the dimers, [CpFe(CO)(NO)]2 and [CpMo(CO)3 ]2 respectively, are · DEC 2011
ABC26IN0499 · Metal-metal quadruple bonds are well-known for the metal · 2005-2021
ABC26IN1363 · The reaction 3 [Rh4(CO)12 ] 2 [Rh6(CO)16 ]+4 CO [25 C, 500 atm CO ] is: · JUNE 2012
ABC26IN0512 · The total number of metal-metal bonds in Ru3(CO)12 and Co4(CO)12, respectively, is · 2005-2021
ABC26IN0520 · Amonst the following, the metal carbonyl species having the highest vCO stretching frequency is · 2005-2021
ABC26IN1377 · The number of metal-metal bonds in [W2(OPh)6 ] is: · JUNE 2013
ABC26IN0239 · The number of metal-metal bonds in Ir4(CO)12 is · 2013
ABC26IN1378 · The number of metal-metal bonds in Ir4(CO)12 is · JUNE 2013
ABC26IN1379 · The bond order of the metal-metal bond in the dimeric complex [Re2 Cl4 (PMe2 Ph )4 ] is · DEC 2013
ABC26IN1392 · The compound [Re2 (Me2 PPh )2 Cl4 ](M) having a configuration of sigma 2 pi 4 delta 2 delta *2 can be oxidized to M+ and M2+. The formal… · JUNE 2014
ABC26IN0539 · The metal borides that contain isolated boron atoms are: · 2005-2021
ABC26IN1394 · 1H NMR spectrum of [5-C5H5Rh)(C2H4)2] at -20 shows a typical AA' XX' pattern in the olefinic region. On increasing the temperature to -70… · JUNE 2014
ABC26IN0257 · The final products of the reaction of carbonyl metalates [V(CO)6]- and [Co(CO)4]- with H3PO4 respectively, are · 2015
ABC26IN1428 · The final products of the reaction of carbonyl metalates [V(CO)6 ]- and [Co(CO)4 ]- with H3 PO4 respectively, are · DEC 2015
ABC26IN1436 · The number of metal-metal bonds in [Co2 Fe2(CO)11 (4-PPh )2 ] is · DEC 2015
ABC26IN1456 · An organometallic fragment that is isolobal to CH3 +is · JUNE 2017
ABC26IN1489 · Considering sigma -bonding only, in the MO diagram of a metal complex with trigonal bipyramidal (TBP) geometry, the d-orbitals which remain… · JUNE 2019
ABC26IN0282 · The correct order of metal-carbon distance is · 2019self-practice
ABC26IN1492 · The correct order of metal-carbon distance is · DEC 2019
Metallocenes Cp Arene
ABC26IN1396 · The hepticities 'x' and 'y' of the arene moieties in the diamagnetic complex [ (-C6 H6 ) Ru (-C6 H6 ) ] respectively are · DEC 2014
ABC26IN0259 · Correct order of M-C bond length of metallocenes (a-c) 1. [Fe(5-Cp)2] 2. [Ni(5-Cp)2] 3. [Co(5-Cp)2] is— · 2016
ABC26IN1438 · Correct order of M-C bond length of metallocenes (a-c) · DEC 2015
Organometallic Compounds – General
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
ABC26IN0489 · Statement: The characteristic spectroscopic feature of the quadruply bonded [Re2 Cl8 ]2- is a strong royal blue colour Reason: This is due… · 2005-2021
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 [Re2 Cl8 ]2-, the M-M bond order in [Re2 Cl4 (PMe2 Ph )4 ]+and [Re2 Cl4 (PMe2 Ph )4 ]… · 2005-2021
ABC26IN0494 · In the complex, [Ni2 (5-Cp )2(CO)2 ], the IR stretching frequency appears at 1857 cm-1 (strong) and 1897 cm-1 (weak). The valence electron… · 2005-2021
ABC26IN1350 · The stable cyclopentadienyl complex of beryllium is · DEC 2011
ABC26IN0495 · The correct classification of [B5 H5 ]2-, B5 H9 and B5 H11 respectively is · 2005-2021
ABC26IN0496 · In the reaction shown bnelow, X and Y respectively are Mn2(CO)10 Na(X) CH3 COCl(Y) · 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