Comprehensive Analysis of Molecular Motion and Bonds of C19H21CLN2O Fungicide for Investigation of Unsteady Effects

Download Full-Text PDF Cite this Publication

Text Only Version

Comprehensive Analysis of Molecular Motion and Bonds of C19H21CLN2O Fungicide for Investigation of Unsteady Effects

Rajesh Kumar

Department of Physics, Indira Gandhi National Tribal University, Amarkantak (MP), India

Abstract: This presented study is useful to enhance the ability of fungicides based on molecular theory. The crystallographic analysis of Pencycuron (C19H21ClN2O) substance is done by us in the previous studies. Now, this work is extended as comprehensive analysis of molecular motion and bonding using Born Oppenheimer Approximation and molecular theory. So, this presented work is helpful to investigation of unsteady effects of the substance and possible solution for the desired result. Samples were prepared by a phase change process from liquid state to solid state at room temperature 30 0C. The molecular structure of C19H21ClN2O substance was investigated by automatic computerized -4- Circles Enraf – Nonius CAD 4- Diffractometer with help of SHELXL 97 and SHELXS program. The reduced mass and moment of inertia for diatomic molecules were evaluated by µ = and µr2

+

respectively for bond analysis.

Keywords: Unsteady effects, Molecular motion, Born Oppenheimer Approximation, Inter-atomic distance, Diffractometer

  1. INTRODUCTION

    The C19H21ClN2O fungicide is a compound of molecules which is use in botanical and agriculture purpose for control of fungal [1]. Molecular structure and packing diagram of C19H21ClN2O fungicide were reported by J. Chauhan et al. [2]. In the late 1800s and early 1900s were developed new theories of atomic and molecular for interpretation of atom and molecular [3]. The wave function and quantum number associated with moving molecules for confirming motion as electronic, vibration and rotational motion. On the basis of motion of molecules there are three kinds of energy named as electronic energy Ee, vibrational energy Ev and rotational energy Er. There are various energy levels and transition levels are possible due to involvement of quantum numbers with motion. Quantum numbers v, j = 0, 1,2,3,4 are associated with vibration and rotational motion respectively. In quantum theory, the wave function is also attached with each motion. The electron transition is occurred between two energy states; it will absorb or emit the energy as a form of electromagnetic radiation [4]. The Born Oppenheimer Approximation (BOA) is separated motion of molecules as electronic and nuclear motion [5]. Therefore. Vibrational and rotational motion considered under nuclear motion. The C19H21ClN2O substance has bond length, bond angles and torsion angles which are affecting its impact due to apropos motions and transitions.

      1. Research Methodology

        The chemical structure of C19H21ClN2O substance is providing the information of molecular position, which is helpful for analysis. Solid sample were prepared from liquid by natural evaporation process. The crystallographic structure was investigated by CAD 4 circle – diffractometer at SAIF, IIT, Madras at 293 K. The molecular structure are provides the information of molecules position, bonds and length. Based on the bond and bond length, we evaluated the reduced mass and moment of inertia by formula. The molecular has vibrational and rotational motion. Therefore, inter-atomic distance (r), moment of inertia (µ) and attraction force has been changed due to vibrational motion of atoms. This change is affected by the impact of C19H21ClN2O substance. Another thing is that the electron transitions from energy level to various excited states, so electrons will be delocalized and simultaneously bond length has been changed. Impact of bond length may be responsible for the unsteady effect of the substance. Based on the value of moment of inertia and reduced mass, we can find the variation of the compounds due to molecular motion. The absorption and transition rate of C19H21ClN2O substance will be affected by electron transition and energy levels. During motion, the possible energy or total energy of the molecules expressed as [6].

        ETotal = Espin + Enuclues + Etransition + Eelectronic + Erotational + Evibrational

        The temperature variation and doping can change the total energy of molecules. Based on the quantum model, the wave function is associated with each motion, and they explain motion, energy and amplitude as well. This hypothesis is useful for investigation of the unsteady effect of concerned substances.

      2. Theoretical Hypothesis

    The basic information like reactivity, structure energy and stability is provided by vibrational motions of molecules or chemical reactions [7]. Molecular motion was proved by Nuclear Magnetic and Resonance (NMR) in 1997 by G Palmer [8]. The molecule has spin, transition, nucleus, electronic, rotational and vibrational motions, which all of them release energy. When two atoms interact with each other and connect with distance r. Due to vibrational motion this bond length will be changed, so accordingly attractiveness is also changed. Reduced mass

    of the diatomic system depends on mass of concerned atoms. When atoms or molecules are rotating with their own axis, this motion has a moment of inertia.

    m1 m2

    FIGURE 1: Schematic representation of bond length (r) of diatomic molecules.

    Reduced mass of diatomic molecules is

    dimensional motion or transition, related bond length, bond angle, reduced mass and moment of inertia will vary or change. In the Pencycuron, we have two benzene rings with six molecules for each.

    Chemical weight of C19H21ClN2O = 328. 6547 g/mol.

    µ =

    +

    Where, m1 and m2 is masses of atoms The moment of inertia evaluated by

    [1]

    FIGURE 2: Chemical structure of C19H21ClN2O substance in 2D (PubChem).

    I = µr2 [2]

    Here, µ is the reduced mass and r is the distance between two atoms.

    The rotational energy (Er) of diatomic molecules is inversely proportional to the moment of inertia, and it is varying with rotational quantum number J (= 1, 2, 3…) and rotational constant B. We have various energies level with j and B, hence possible electron transitions will be occurred in these energies.

    The complex molecules are present in

    C19H21ClN2O substance which will affect its results. Further, the impact of substances depends on electronic transition, absorption and transmission rates. The optical excitations are providing information of the electronic states of the complex molecules based on the study of emission [9]. Therefore, bond length may decrease or increase based on type of motions. Experimental bond lengths basically depend on molecular vibration and

    Er =

    µ^

    =

    [3]

    computational bond lengths are available. These both bond

    lengths have differences in range 1000- 100 Ã… due to

    The chemical structure of C19H21ClN2O substance is shown in figure 2, and it provides ideas of molecular position, compounds and bonds etc. During three-

    temperature variation [10].

    TABLE 1: Description of associated atoms with C19H21ClN2O substance

    Atoms Name

    Atomic mass (in u)

    No. of Atoms

    Coding of atom*

    Carbon

    12.011

    C 19

    C1, C2, C3, C4 C5, C6, C7, C8, C9 C10, C11, C12, C13, C14 C14, C15, C16, C17, C18

    and C19

    Nitrogen

    14.007

    N 2

    N1, N2

    Chlorine

    35.435

    Cl 1

    Cl1

    Oxygen

    15.999

    O- 1

    O1

    *Atoms coding is required for analysis of substance.

    3. RESULTS AND DISCCUISSION

    In the molecular structure, we have two benzene rings present in C19H21ClN2O substance, each ring having 6 molecules and connected in ring form. The associated molecules with ring is (Ring 1) C2, C3, C4, C5, C6, C7 (Ring

    1) and C14, C15, C16, C17, C18 and C19 (Ring 2). When these rings are in motion, the bond length has been changed along with the moment of inertia. We are showing bonds, bond length, reduced mass and moment of inertia in table

  2. The lowest bond length is 1.231 * 10-10 m for C7- O1 and highest is 1.745 * 10-10 m for C17- Cl2. We observed that various bond lengths for the same bond due to vibrational and electronic motion of molecules such as 1,386 * 10-10 m, 1.515 * 10-10 m and 1.723 * 10-10 m is for C1 C2, C9 C10 and C6- C1 respectively. Reduced mass of C- C bond is 9.968 * 10-27 Kg that is lowest in the whole compound and C17 Cl2 is 14.895* 10-27 Kg (highest). The value of µ is different for the various compounds, and it is related to the

    moment of inertia of the concerned diatomic molecules. Hence, moment of inertia I = µr2 it also varies with µ. By evaluation, we obtained a moment of inertia for C7 O1 is 17.261 *10-47 kg-m2 and C17- Cl2 is 45.355 *10-47 kg-m2.

    The moment of inertia depends on reduced mass and inter- atomic distance [11]. The variation of moment of inertia with bond length due to variable temperature we showed on figure 4. This variation indicates that all compounds and bonds are not active properly; it means some bonds are inactive in nature. Similar, moment of inertia vs reduced mass is represented on figure 5 for variation of compounds.

    When reduced mass is increased or decreased, accordingly these impacts reflect on I. As collected data the bond length not equal is with the same bond due to nuclear and electronic motions. The Born Oppenheimer Approximation says that both motions can be separate and electronic and nuclear motion has wave function e and n

    respectively [12]. During molecules motion, the absorption and transition rate we can find by the rotational, vibrational and electronic motions of molecules for study of excitation and energy levels. The result of C19H21ClN2O substance depends on all above parameters like I, µ, r, E (Er, Ev, Ee), T and variation of all of them. For enhancement of output, we can add doping with suitable material or remove unwanted and inactive compounds but this is not limited.

    Also, we can use another way for the solution of the problem by chemical, optical, electrical and physical properties based on the fungicide analysis in Nano- particles form. This presented paper is helpful to improve of C19H21ClN2O substance based on the physical aspect only for getting desired outcome for good result of fungicides in the crops.

    TABLE 2: Data collection and evaluation

    Bonds name

    Atomic mass of atom 1

    (In u)

    Atomic mass of atom 2

    (In u)

    Bond length (r) (In 10-10 m)

    Reduce mass (In 10-27 Kg)

    I = µr2

    (In 10-47 kg-m2)

    Atom names (1)

    Atom names (2)

    C1

    N1

    12.011

    14.007

    1.412

    10.737

    21.406

    C14

    C15

    12.011

    12.011

    1.381

    9.968

    19.010

    C13

    N2

    12.011

    14.007

    1.452

    10.737

    22.636

    C15

    C16

    12.011

    12.011

    1.383

    9.968

    19.065

    C7

    O1

    12.011

    15.999

    1.231

    11.391

    17.261

    C16

    C17

    12.011

    12.011

    1.363

    9.968

    18.518

    C7

    N2

    12.011

    14.007

    1.360

    10.737

    19.859

    C17

    C18

    12.011

    12.011

    1.364

    9.968

    18.545

    C7

    N1

    12.011

    14.007

    1.370

    10.737

    20.152

    C17

    Cl2

    12.011

    35.435

    1.745

    14.895

    45.355

    C8

    N2

    12.011

    14.007

    1.478

    10.737

    23.454

    C18

    C19

    12.011

    12.011

    1.383

    9.968

    19.065

    C1

    C2

    12.011

    12.011

    1.386

    9.968

    19.148

    C2

    C3

    12.011

    12.011

    1.376

    9.968

    18.873

    C3

    C4

    12.011

    12.011

    1.363

    9.968

    18.518

    C4

    C5

    12.011

    12.011

    1.377

    9.968

    18.900

    C5

    C6

    12.011

    12.011

    1.383

    9.968

    19.065

    C6

    C1

    12.011

    12.011

    1.723

    9.968

    29.592

    C8

    C9

    12.011

    12.011

    1.516

    9.968

    22.909

    C8

    C12

    12.011

    12.011

    1.533

    9.968

    23.425

    C9

    C10

    12.011

    12.011

    1.515

    9.968

    22.878

    C10

    C11

    12.011

    12.011

    1.495

    9.968

    22.278

    C11

    C12

    12.011

    12.011

    1.504

    9.968

    22.547

    C13

    C14

    12.011

    12.011

    1.518

    9.968

    22.969

    C14

    C19

    12.011

    12.011

    1.380

    9.968

    18.983

    FIGURE 3: Benzene rings of Pencycuron substance, J. Chauhan et al, (2013), IJSER, 4(11), 988-998.

    FIGURE 4: Variation of moment of inertia with bond length.

    FIGURE 5: Moment of inertia vs reduced mass

    Table 3: Lowest and highest value of molecules bond

    S.

    No.

    Parameters name

    Lowest value and concerned bonds name

    Highest value and concerned bonds name

    1

    Bond length

    1.231 * 10-10 m C7- O1

    1.745 * 10-10 m C17- Cl2

    2

    Reduced mass

    9.968 * 10-27 Kg C – C

    14.895* 10-27 Kg C17- Cl2

    3

    Moment of inertia

    17.261 *0-47 kg-m2 C7 O1

    45.355 *10-47 kg-m2 C17- Cl2

    1. CONCLUSION

      We find the unsteady effects of C19H21ClN2O substance based on the molecules theory. The motion of molecules may change the bond length, moment of inertia and transition rate of the fungicides. Sometimes, elements and compounds is inactive mode due to impact of climate and electron delocalization. This study is very useful to find the unwanted compounds. So we can resolve this problem by substitution of suitable elements and doping. Hence, we can enhance the ability of fungicides by this reported work and may achieve desired outcome in the crops and flowers. The transmission and absorption rates of fungicides can be increase by molecular motion. So, fungicides will be more effective to control of fungal than we can obtain good result.

    2. ACKNOWLEDGEMENTS

We are very grateful thanks to Sophisticated Analysis Instrumentation Facilities (SAIF), IIT, Madras for CAD 4- Circle Diffractometer and data collection.

REFERENCES

  1. S. C. Vyas (1993), Hand book of Systemic Fungicides, V-II, Tata Mc Graw Hill, New Delhi.

  2. J. Chauhan and R Kumar, (2013) X-Ray Crystallographic Analysis of Fungicide Monceren N-(4- chlorophyll methyl) N- cyclopentyl N phenylurea; International Journals of Scientific and Engineering Research, 4(11), 988-998

  3. A. M. Donald and D. S. John, (2004), Molecular Thermodynamics, Viva Book Private Limited, New Delhi.

  4. R. Kumar (2016), Atomic and Molecular Physics, Campus Books International, New Delhi.

  5. P. R. Bunker and P. Jansen, (2012), Molecular Symmetry and Spectroscopy, Overseas Press India Private Limited, New Delhi.

  6. S. Ilyas, (2016), Atomic Structure, Globus Press, New Delhi.

  7. D. Cremer and E. Elfi, (2010), From Molecular Vibrational to bonding, Chemical Reactions, and Reaction Mechanism, Current Organic Chemistry, 14, 1524-1560

  8. G. Palmer, (1997), Probing molecular motion by Nuclear Magnetic Resonance, Current Opinion in Structure biology, 7 (5), 732-737

  9. M. Kasha (1950), Characterisation of electronic transition in complex molecules, Discussion of the Faraday Society, 9, 14-19

  10. M. Hargittai and I. Hargittai, (1997), Experimental and Computed bond lengths: The importance of their differences, International Journal of Quantum Chemistry, 44, 1057-1067, https://doi.org/10.1002/qua.560440610

  11. A. Johnson, H. Ryde and S. A. Hjorth, (1972), Nuclear Moment of Inertia at High rotational frequencies. 179 (3), 753- 768.

  12. B. G. Woolley, and B.T. Sutctiffe, (1977), Molecular structure and Born- Oppenheimer Approximation, Chemical Physics Letter, 45 (2), 393- 398.

Leave a Reply

Your email address will not be published. Required fields are marked *