The correct IUPAC name of [Fe(C5H5)2] is
The correct answer is option B.
The I.U.P.A.C. name for Fe(C5H5)2 is bis(η5 -cyclopentadienyl) iron(II)
The oxidation state of iron is +2 and is written in parenthesis in roman numerals. Two cyclopentadienyl ligands are coordinated to Fe. The prefix bis indicates 2. η5 indicates that the cyclopentadienyl ligands are penta coordinates.
Type of isomerism exhibited by [Cr(NCS)(NH3)5] [ZnCl4] :
Since both cation & anion constitute coordination sphere so it exhibit coordination isomerism and contains ambident ligand so, it shows linkage isomerism
A complex compound in which the oxidation number of a metal is zero is
A complex compound in which the oxidation number of metal is zero is [Ni(CO)4]. In this complex, the oxidation number of both metal and ligand is zero.
The oxidation number of metal in the complexes K4[Fe(CN)6], K3[Fe(CN)6] and [Pt(NH3)4]Cl2 are +2, +3 and +2 respectively.
Trioxalato aluminate (III) and tetrafluorido-borate (III) ions are respectively :
O. N. of Al = +3
O. N. of B = + 3
Which of the ligand can show linkage isomerism and acts as flexidentate ligand:
Consider the following statements, "According the Werner's theory. :
(1) Ligands are connected to the metal ions by covalent bonds.
(2) Secondary valencies have directional properties.
(3) Secondary valencies are non-ionisable.
(4) Secondary valencies are satisfied by either neutral or negative legands.
Of these statements.
Consider werner’s theroy
From the stability constant (hypothetical values), given below, predict which is the strongest ligand:
Higher the value of K higher will be strength of ligand & more will be thermodynamic stability of complex produced.
The complexes given below show:
In which of the following complexes the nickel metal is in highest oxidation state.
An ion M2+, forms the complexes [M(H2O)6]2+, [M(en)3]2+ and [MBr6]4-, match the complex with the appropriate colour.
Δo value is directly proportional to energy and inversely related to the wavelength. Also, more the ligand is a strong field ligand More will be the value of Δo and lower will be its wavelength. Among the given complexes the strength of ligands are Br− < H2O < en.
Since the emitted colours are red, green, blue the absorbed colours must be green,red,orange. Hence the compound [M(H2O)6]2+, [M(en)3]2+, [M(Br)6]4− are blue red and green respectively. Hence option B is correct.
For the complex ion dichlorido bis (ethylene diamine) cobalt (III), select the correct statement.
Co(CO)4 follows EAN rule by :
EAN = 27 –(0)+ 4 × 2 = 35
2[Co(CO)4] → Co2(CO)8
EAN = 27 + 1 + 4 ×2 = 36
Type of isomerism exhibited by [Ir(OCN)2(H2O)3]
–OCN is ambident ligand & it shows linkage isomerism.
Which of the following complex exhibits geometrical isomerism:
[PtBrCl NH3 Py] Pt2+ is dsp2 hybridised & hence geometry is square planner & sq. planner complex with four different ligands shows geometrical isomerism.
A complex of platinum, ammonia and chloride produces four ions per molecule in the solution. The structure consistent with the observation is :
[Pt(NH3)4]Cl4 → 5 ions
[Pt(NH3)2Cl4] → 0 ions
[Pt(NH3)4Cl2]Cl2 → 3 ions
The total number of possible isomers of the compound [Cu||(NH3)4] [Pt||Cl4] are :
In the complex Fe(CO)x, the value of x is :
EAN = 26 + 2x = 36
x = 5
The complex which exhibits cis-trans isomerism as well as can be resolved into d and ℓ forms:
The oxidation state of Mo in its oxo-complex species [Mo2O4(C2H4 )2(H2O)2]2- is :
Let the O. N. of Mo in the complex is x
2x + (–2) × 2 + 0 × 2 + 0 × 2 = – 2
The hybridisation and unpaired electrons in [Fe(H2O)6]2+ ion are :
H2O is weak field ligand
In which complex is the transition metal in zero oxidation state:
K4[Ni(CN)4] Let O.S of Ni = x
4 + x – 4 = 0
x = 0
(A) Co3+ (B) Fe2+ (C) Co–1
Formula of ferrocene is :
The hybrisation of Co in [Co(H2O)6]3+ is :
In this complex compound the total charge is +3 as H2O is a neutral compound so the oxidation state of cobalt is +3 and the electronic configuration of Co is 3d7 4s2. So, Co(+3)=4d6 and H2O is a weak ligand so there is no pairing of electron. So,4s 4p3 and 4d2 orbital make hybrid orbital to have a hybridization of sp3d2.
Which of the following is π complex :
Al(C2H5)3 σ - complex
Fe(C5H5)2 π - complex
Zn(C2H5)2 σ - complex
[Ni(CO)4] σ - complex
Which complex is likely to show optical activity
No POS optically active rest compound has POS.
Which one is the most likely structure of CrCl3·6H2O if 1/3 of total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution :
Coordination no. of Cr = 6
1/3 × 3 = 1 Chloride ion is outside the coordination sphere.
The two compounds [Co(SO4)(NH3)5]Br and [Co(SO4)(NH3)5]Cl represent :
Different molecular mass, so no isomerism
The structure of iron pentacarbonyl is :
CO is strong field ligand
Fe - 3d64s2
The EAN of platinum in potassium hexachloroplatinate (IV) is :
At No. Pt = 78
EAN = 78 – 4 + 6 × 2 = 86
Diethylene triamine is :